C1111233131211111211113313331333133313232321333133313331333131121311112221311   >>    C111123313121111121111331333133313331323232133313331333133313112131111222131   <<    C1111233131211111211113313331333133313232321333133313331333131121311112221313   >>      C1111233131211111211113313331333133313232321333133313331333131121311112221312   >>