C11111211113313112113313331333133313331333132313331333133313331321123232211211   >>    C1111121111331311211331333133313331333133313231333133313331333132112323221121   <<    C11111211113313112113313331333133313331333132313331333133313331321123232211213   >>      C11111211113313112113313331333133313331333132313331333133313331321123232211212   >>