C1111233133313231133133313331333133313231312111133131211113313332221221   >>    C111123313331323113313331333133313331323131211113313121111331333222122   <<    C1111233133313231133133313331333133313231312111133131211113313332221223   >>      C1111233133313231133133313331333133313231312111133131211113313332221222   >>