C11111211113313112113313331333133313331322113312111133132211312131   >>    C1111121111331311211331333133313331333132211331211113313221131213   <<    C11111211113313112113313331333133313331322113312111133132211312133   >>      C11111211113313112113313331333133313331322113312111133132211312132   >>