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#107 baaaabbbba=aaaa

Original presentation

\( \left\langle a, b \;\middle|\; b a^{4} b^{4} a = a^{4} \right\rangle \)

Modified presentation

\( \left\langle a, b, c, d \;\middle|\; b c^{2} d a = c^{2},\; c = a^{2},\; d = b^{4} \right\rangle \)

Complete rewriting system

Using recursive path order (RPOCmp) with \(a < d < b < c\):

\( \begin{aligned} c &\rightarrow a^{2} \\ b^{4} &\rightarrow d \\ b d &\rightarrow d b \\ b a^{4} &\rightarrow d a^{4} d a d a d a \\ d a^{4} d a d a d a d a &\rightarrow a^{4} \\ d a^{4} d a d a d a^{5} &\rightarrow a^{7} d a d a d a d a \end{aligned} \)