C11111211113313112113313331333133313331333132212111133133313331323223332211   >>    C1111121111331311211331333133313331333133313221211113313331333132322333221   <<    C11111211113313112113313331333133313331333132212111133133313331323223332213   >>      C11111211113313112113313331333133313331333132212111133133313331323223332212   >>