YES After renaming modulo { f->0, 0->1, s->2, d->3 }, it remains to prove termination of the 4-rule system { 0 1 -> 2 1 , 3 1 -> 1 , 3 2 -> 2 2 3 , 0 2 -> 3 0 } The system was filtered by the following matrix interpretation of type E_J with J = {1,...,2} and dimension 2: 0 is interpreted by / \ | 1 1 | | 0 1 | \ / 1 is interpreted by / \ | 1 1 | | 0 1 | \ / 2 is interpreted by / \ | 1 0 | | 0 1 | \ / 3 is interpreted by / \ | 1 0 | | 0 1 | \ / After renaming modulo { 3->0, 1->1, 2->2, 0->3 }, it remains to prove termination of the 3-rule system { 0 1 -> 1 , 0 2 -> 2 2 0 , 3 2 -> 0 3 } The system was filtered by the following matrix interpretation of type E_J with J = {1,...,2} and dimension 3: 0 is interpreted by / \ | 1 0 1 | | 0 1 0 | | 0 0 1 | \ / 1 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 1 0 | \ / 2 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 1 | \ / 3 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / After renaming modulo { 0->0, 2->1, 3->2 }, it remains to prove termination of the 2-rule system { 0 1 -> 1 1 0 , 2 1 -> 0 2 } The system was filtered by the following matrix interpretation of type E_J with J = {1,...,2} and dimension 3: 0 is interpreted by / \ | 1 0 1 | | 0 1 0 | | 0 0 2 | \ / 1 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 1 1 | \ / 2 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / After renaming modulo { 2->0, 1->1, 0->2 }, it remains to prove termination of the 1-rule system { 0 1 -> 2 0 } The system was filtered by the following matrix interpretation of type E_J with J = {1,...,2} and dimension 2: 0 is interpreted by / \ | 1 0 | | 0 1 | \ / 1 is interpreted by / \ | 1 1 | | 0 1 | \ / 2 is interpreted by / \ | 1 0 | | 0 1 | \ / After renaming modulo { }, it remains to prove termination of the 0-rule system { } The system is trivially terminating.