MAYBE
by ttt2 (version ttt2 1.15)
The rewrite relation of the following TRS is considered.
| begin(end(x0)) | → | rewrite(end(x0)) | 
| begin(C(x0)) | → | rotate(cut(CC(guess(x0)))) | 
| begin(c(x0)) | → | rotate(cut(Cc(guess(x0)))) | 
| begin(b(x0)) | → | rotate(cut(Cb(guess(x0)))) | 
| begin(B(x0)) | → | rotate(cut(CB(guess(x0)))) | 
| guess(C(x0)) | → | CC(guess(x0)) | 
| guess(c(x0)) | → | Cc(guess(x0)) | 
| guess(b(x0)) | → | Cb(guess(x0)) | 
| guess(B(x0)) | → | CB(guess(x0)) | 
| guess(C(x0)) | → | moveleft(BC(wait(x0))) | 
| guess(c(x0)) | → | moveleft(Bc(wait(x0))) | 
| guess(b(x0)) | → | moveleft(Bb(wait(x0))) | 
| guess(B(x0)) | → | moveleft(BB(wait(x0))) | 
| guess(end(x0)) | → | finish(end(x0)) | 
| CC(moveleft(BC(x0))) | → | moveleft(BC(AC(x0))) | 
| Cc(moveleft(BC(x0))) | → | moveleft(BC(Ac(x0))) | 
| Cb(moveleft(BC(x0))) | → | moveleft(BC(Ab(x0))) | 
| CB(moveleft(BC(x0))) | → | moveleft(BC(AB(x0))) | 
| CC(moveleft(Bc(x0))) | → | moveleft(Bc(AC(x0))) | 
| Cc(moveleft(Bc(x0))) | → | moveleft(Bc(Ac(x0))) | 
| Cb(moveleft(Bc(x0))) | → | moveleft(Bc(Ab(x0))) | 
| CB(moveleft(Bc(x0))) | → | moveleft(Bc(AB(x0))) | 
| CC(moveleft(Bb(x0))) | → | moveleft(Bb(AC(x0))) | 
| Cc(moveleft(Bb(x0))) | → | moveleft(Bb(Ac(x0))) | 
| Cb(moveleft(Bb(x0))) | → | moveleft(Bb(Ab(x0))) | 
| CB(moveleft(Bb(x0))) | → | moveleft(Bb(AB(x0))) | 
| CC(moveleft(BB(x0))) | → | moveleft(BB(AC(x0))) | 
| Cc(moveleft(BB(x0))) | → | moveleft(BB(Ac(x0))) | 
| Cb(moveleft(BB(x0))) | → | moveleft(BB(Ab(x0))) | 
| CB(moveleft(BB(x0))) | → | moveleft(BB(AB(x0))) | 
| cut(moveleft(BC(x0))) | → | DC(cut(goright(x0))) | 
| cut(moveleft(Bc(x0))) | → | Dc(cut(goright(x0))) | 
| cut(moveleft(Bb(x0))) | → | Db(cut(goright(x0))) | 
| cut(moveleft(BB(x0))) | → | DB(cut(goright(x0))) | 
| goright(AC(x0)) | → | CC(goright(x0)) | 
| goright(Ac(x0)) | → | Cc(goright(x0)) | 
| goright(Ab(x0)) | → | Cb(goright(x0)) | 
| goright(AB(x0)) | → | CB(goright(x0)) | 
| goright(wait(C(x0))) | → | moveleft(BC(wait(x0))) | 
| goright(wait(c(x0))) | → | moveleft(Bc(wait(x0))) | 
| goright(wait(b(x0))) | → | moveleft(Bb(wait(x0))) | 
| goright(wait(B(x0))) | → | moveleft(BB(wait(x0))) | 
| goright(wait(end(x0))) | → | finish(end(x0)) | 
| CC(finish(x0)) | → | finish(C(x0)) | 
| Cc(finish(x0)) | → | finish(c(x0)) | 
| Cb(finish(x0)) | → | finish(b(x0)) | 
| CB(finish(x0)) | → | finish(B(x0)) | 
| cut(finish(x0)) | → | finish2(x0) | 
| DC(finish2(x0)) | → | finish2(C(x0)) | 
| Dc(finish2(x0)) | → | finish2(c(x0)) | 
| Db(finish2(x0)) | → | finish2(b(x0)) | 
| DB(finish2(x0)) | → | finish2(B(x0)) | 
| rotate(finish2(x0)) | → | rewrite(x0) | 
| rewrite(C(x0)) | → | begin(c(x0)) | 
| rewrite(c(c(x0))) | → | begin(x0) | 
| rewrite(b(b(x0))) | → | begin(B(x0)) | 
| rewrite(B(B(x0))) | → | begin(b(x0)) | 
| rewrite(c(B(c(b(c(x0)))))) | → | begin(B(c(b(c(B(c(b(x0)))))))) | 
| rewrite(b(B(x0))) | → | begin(x0) | 
| rewrite(B(b(x0))) | → | begin(x0) | 
| rewrite(c(C(x0))) | → | begin(x0) | 
| rewrite(C(c(x0))) | → | begin(x0) | 
| begin(end(x0)) | → | rewrite(end(x0)) | 
| begin(C(x0)) | → | rotate(cut(CC(guess(x0)))) | 
| begin(c(x0)) | → | rotate(cut(Cc(guess(x0)))) | 
| begin(b(x0)) | → | rotate(cut(Cb(guess(x0)))) | 
| begin(B(x0)) | → | rotate(cut(CB(guess(x0)))) | 
| guess(C(x0)) | → | CC(guess(x0)) | 
| guess(c(x0)) | → | Cc(guess(x0)) | 
| guess(b(x0)) | → | Cb(guess(x0)) | 
| guess(B(x0)) | → | CB(guess(x0)) | 
| guess(C(x0)) | → | moveleft(BC(wait(x0))) | 
| guess(c(x0)) | → | moveleft(Bc(wait(x0))) | 
| guess(b(x0)) | → | moveleft(Bb(wait(x0))) | 
| guess(B(x0)) | → | moveleft(BB(wait(x0))) | 
| guess(end(x0)) | → | finish(end(x0)) | 
| CC(moveleft(BC(x0))) | → | moveleft(BC(AC(x0))) | 
| Cc(moveleft(BC(x0))) | → | moveleft(BC(Ac(x0))) | 
| Cb(moveleft(BC(x0))) | → | moveleft(BC(Ab(x0))) | 
| CB(moveleft(BC(x0))) | → | moveleft(BC(AB(x0))) | 
| CC(moveleft(Bc(x0))) | → | moveleft(Bc(AC(x0))) | 
| Cc(moveleft(Bc(x0))) | → | moveleft(Bc(Ac(x0))) | 
| Cb(moveleft(Bc(x0))) | → | moveleft(Bc(Ab(x0))) | 
| CB(moveleft(Bc(x0))) | → | moveleft(Bc(AB(x0))) | 
| CC(moveleft(Bb(x0))) | → | moveleft(Bb(AC(x0))) | 
| Cc(moveleft(Bb(x0))) | → | moveleft(Bb(Ac(x0))) | 
| Cb(moveleft(Bb(x0))) | → | moveleft(Bb(Ab(x0))) | 
| CB(moveleft(Bb(x0))) | → | moveleft(Bb(AB(x0))) | 
| CC(moveleft(BB(x0))) | → | moveleft(BB(AC(x0))) | 
| Cc(moveleft(BB(x0))) | → | moveleft(BB(Ac(x0))) | 
| Cb(moveleft(BB(x0))) | → | moveleft(BB(Ab(x0))) | 
| CB(moveleft(BB(x0))) | → | moveleft(BB(AB(x0))) | 
| cut(moveleft(BC(x0))) | → | DC(cut(goright(x0))) | 
| cut(moveleft(Bc(x0))) | → | Dc(cut(goright(x0))) | 
| cut(moveleft(Bb(x0))) | → | Db(cut(goright(x0))) | 
| cut(moveleft(BB(x0))) | → | DB(cut(goright(x0))) | 
| goright(AC(x0)) | → | CC(goright(x0)) | 
| goright(Ac(x0)) | → | Cc(goright(x0)) | 
| goright(Ab(x0)) | → | Cb(goright(x0)) | 
| goright(AB(x0)) | → | CB(goright(x0)) | 
| goright(wait(C(x0))) | → | moveleft(BC(wait(x0))) | 
| goright(wait(c(x0))) | → | moveleft(Bc(wait(x0))) | 
| goright(wait(b(x0))) | → | moveleft(Bb(wait(x0))) | 
| goright(wait(B(x0))) | → | moveleft(BB(wait(x0))) | 
| goright(wait(end(x0))) | → | finish(end(x0)) | 
| CC(finish(x0)) | → | finish(C(x0)) | 
| Cc(finish(x0)) | → | finish(c(x0)) | 
| Cb(finish(x0)) | → | finish(b(x0)) | 
| CB(finish(x0)) | → | finish(B(x0)) | 
| cut(finish(x0)) | → | finish2(x0) | 
| DC(finish2(x0)) | → | finish2(C(x0)) | 
| Dc(finish2(x0)) | → | finish2(c(x0)) | 
| Db(finish2(x0)) | → | finish2(b(x0)) | 
| DB(finish2(x0)) | → | finish2(B(x0)) | 
| rotate(finish2(x0)) | → | rewrite(x0) | 
| rewrite(C(x0)) | → | begin(c(x0)) | 
| rewrite(c(c(x0))) | → | begin(x0) | 
| rewrite(b(b(x0))) | → | begin(B(x0)) | 
| rewrite(B(B(x0))) | → | begin(b(x0)) | 
| rewrite(c(B(c(b(c(x0)))))) | → | begin(B(c(b(c(B(c(b(x0)))))))) | 
| rewrite(b(B(x0))) | → | begin(x0) | 
| rewrite(B(b(x0))) | → | begin(x0) | 
| rewrite(c(C(x0))) | → | begin(x0) | 
| rewrite(C(c(x0))) | → | begin(x0) |