C11111211113313112113313331333133313331333132313331333133313331211111133221221   >>    C1111121111331311211331333133313331333133313231333133313331333121111113322122   <<    C11111211113313112113313331333133313331333132313331333133313331211111133221223   >>      C11111211113313112113313331333133313331333132313331333133313331211111133221222   >>