C11111211113313112113313331333133312111113331333133313331121133133313222331   >>    C1111121111331311211331333133313331211111333133313331333112113313331322233   <<    C11111211113313112113313331333133312111113331333133313331121133133313222333   >>      C11111211113313112113313331333133312111113331333133313331121133133313222332   >>