C1111233131211111211113313231333133313331323221211111211111323211221   >>    C111123313121111121111331323133313331333132322121111121111132321122   <<    C1111233131211111211113313231333133313331323221211111211111323211223   >>      C1111233131211111211113313231333133313331323221211111211111323211222   >>