awk

rbarbosafl@rene-Inspiron-14z:~$ head -50 nums.txt
1
41
05
04
52
30
33
0
17
2016
2
09
39
37
49
43
41
1
65
4488
3
36
30
10
11
29
47
2
62
4261
4
06
59
42
27
01
05
0
39
3311
5
01
19
46
06
16
02
0
98
5399
rbarbosafl@rene-Inspiron-14z:~$ wc -l nums.txt
15590 nums.txt