C1111133313331323223313331333133313311211111211331323133313113313232212131   >>    C111113331333132322331333133313331331121111121133132313331311331323221213   <<    C1111133313331323223313331333133313311211111211331323133313113313232212133   >>      C1111133313331323223313331333133313311211111211331323133313113313232212132   >>