C111123313331323113313331333133313331323131211113313113313332213121   >>    C11112331333132311331333133313331333132313121111331311331333221312   <<    C111123313331323113313331333133313331323131211113313113313332213123   >>      C111123313331323113313331333133313331323131211113313113313332213122   >>