C1111133313331323223313331333133313331323131211113313112231312321   >>    C111113331333132322331333133313331333132313121111331311223131232   <<    C1111133313331323223313331333133313331323131211113313112231312323   >>      C1111133313331323223313331333133313331323131211113313112231312322   >>