C1111133313331323223313331333133313311211111211331323133313231211222221   >>    C111113331333132322331333133313331331121111121133132313331323121122222   <<    C1111133313331323223313331333133313311211111211331323133313231211222223   >>      C1111133313331323223313331333133313311211111211331323133313231211222222   >>