C1111233133313231133133313231333133313113313113313233313232233132322221   >>    C111123313331323113313331323133313331311331311331323331323223313232222   <<    C1111233133313231133133313231333133313113313113313233313232233132322223   >>      C1111233133313231133133313231333133313113313113313233313232233132322222   >>