C11111211113313112113313331333133313331333132313331333133313121111132232211   >>    C1111121111331311211331333133313331333133313231333133313331312111113223221   <<    C11111211113313112113313331333133313331333132313331333133313121111132232213   >>      C11111211113313112113313331333133313331333132313331333133313121111132232212   >>