C11111211113313112113313331333133313331333132212111133133313331312111133223321   >>    C1111121111331311211331333133313331333133313221211113313331333131211113322332   <<    C11111211113313112113313331333133313331333132212111133133313331312111133223323   >>      C11111211113313112113313331333133313331333132212111133133313331312111133223322   >>