C1111233131211111211113313331333133313232321333133313331311133311321   >>    C111123313121111121111331333133313331323232133313331333131113331132   <<    C1111233131211111211113313331333133313232321333133313331311133311323   >>      C1111233131211111211113313331333133313232321333133313331311133311322   >>