C11111211113313112113313331333133313331333131211113313331333132313223313211   >>    C1111121111331311211331333133313331333133313121111331333133313231322331321   <<    C11111211113313112113313331333133313331333131211113313331333132313223313213   >>      C11111211113313112113313331333133313331333131211113313331333132313223313212   >>