

how to input multiple .txt files? 

A data folder has lots of .txt files from different customers. 

Want to read all these .txt files to different master files: 

such as: 

 cust1.xx.txt,  cust1.xxx.txt, cust1.xxxx.txt,.............. to master file: X.txt

 cust2.xx.txt,  cust2.xxx.txt, cust2.xxxx.txt,.............. to master file: Y.txt


Thanks!


      
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