C1111133313331323223313331333133313311211111211331323132313231121   >>    C111113331333132322331333133313331331121111121133132313231323112   <<    C1111133313331323223313331333133313311211111211331323132313231123   >>      C1111133313331323223313331333133313311211111211331323132313231122   >>