C11111211113313112113313331333133313331333132313331333133313331211113311232211   >>    C1111121111331311211331333133313331333133313231333133313331333121111331123221   <<    C11111211113313112113313331333133313331333132313331333133313331211113311232213   >>      C11111211113313112113313331333133313331333132313331333133313331211113311232212   >>