20
50000000 3
49999999 3
49999998 3
49999997 3
49999996 3
49999995 3
49999994 3
49999993 3
49999992 3
49999991 3
49999990 3
49999989 3
49999988 3
49999987 3
49999986 3
49999985 3
49999984 3
49999983 3
49999982 3
49999981 3
