Example

Upon input

(a(((bc)d)e)(fg))h

we can change brackets so as to get the rightmost bracketing

a(b(c(d(e(f(gh)))))):

(a(((bc)d)e)(fg))h =
a(((((bc)d)e)(fg))h) =
a((((b(cd))e)(fg))h) =
a(((b((cd)e))(fg))h) =
a((b(((cd)e)(fg)))h) =
a(b(((cd)e)(fg))h) =
a(b(((cd)e)(fg))h) =
.....