C1111233131211111211113313331333133313232321331121111133313112112321   >>    C111123313121111121111331333133313331323232133112111113331311211232   <<    C1111233131211111211113313331333133313232321331121111133313112112323   >>      C1111233131211111211113313331333133313232321331121111133313112112322   >>