C11111211113313112113313331333133313331312111133131122112233232311   >>    C1111121111331311211331333133313331333131211113313112211223323231   <<    C11111211113313112113313331333133313331312111133131122112233232313   >>      C11111211113313112113313331333133313331312111133131122112233232312   >>