20
50000000 1
49999999 1
49999998 1
49999997 1
49999996 1
49999995 1
49999994 1
49999993 1
49999992 1
49999991 1
49999990 1
49999989 1
49999988 1
49999987 1
49999986 1
49999985 1
49999984 1
49999983 1
49999982 1
49999981 1
