Re^6: sorting and merging in perl

Select or download this

7900724666,200906888,20180416,20180522
7900724666,200906888,20180601,20180720
...
7900724622,200906890,20180905,20180930
7900724622,200906890,20181005,20181030
7900724622,200906890,20181104,

Select or download this

7900724666,200906888,20180416,20180411
7900724688,200906881,20180101,20180330
...
7900724611,200906890,20180905,
7900724622,200906869,20180601,20180728
7900724622,200906890,20180905,

Select or download this

7900724611,200906889,20180724,20180720

Select Code to Download