C111123313331323113313331333133313331323132311233132332313221211   >>    C11112331333132311331333133313331333132313231123313233231322121   <<    C111123313331323113313331333133313331323132311233132332313221213   >>      C111123313331323113313331333133313331323132311233132332313221212   >>