C11111211113313112113313331333133313331312111133132212111112111133132321111211   >>    C1111121111331311211331333133313331333131211113313221211111211113313232111121   <<    C11111211113313112113313331333133313331312111133132212111112111133132321111213   >>      C11111211113313112113313331333133313331312111133132212111112111133132321111212   >>