C11111211113313112113313331333133313331333132313331333133313113313112211232221   >>    C1111121111331311211331333133313331333133313231333133313331311331311221123222   <<    C11111211113313112113313331333133313331333132313331333133313113313112211232223   >>      C11111211113313112113313331333133313331333132313331333133313113313112211232222   >>