C1111133313331323223313331333133313311211111211331313331323133221   >>    C111113331333132322331333133313331331121111121133131333132313322   <<    C1111133313331323223313331333133313311211111211331313331323133223   >>      C1111133313331323223313331333133313311211111211331313331323133222   >>