C11111211113313112113313331333133313331333132212111133132313331323223331211   >>    C1111121111331311211331333133313331333133313221211113313231333132322333121   <<    C11111211113313112113313331333133313331333132212111133132313331323223331213   >>      C11111211113313112113313331333133313331333132212111133132313331323223331212   >>