C11111333133313232233133313331333133313231312111112313231333121   >>    C1111133313331323223313331333133313331323131211111231323133312   <<    C11111333133313232233133313331333133313231312111112313231333123   >>      C11111333133313232233133313331333133313231312111112313231333122   >>