C11111333133313232233133313331333133313231312111111221123133311321   >>    C1111133313331323223313331333133313331323131211111122112313331132   <<    C11111333133313232233133313331333133313231312111111221123133311323   >>      C11111333133313232233133313331333133313231312111111221123133311322   >>