Reading text file in perl
1. How does perl help me to tell the exact position of each character in a sentence and a word hierarchically 

2. How can I extract left and right context of each character in a text file 
  
Reading text file in perl
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1. How does perl help me to tell the exact position of each character in a sentence and a word hierarchically 

2. How can I extract left and right context of each character in a text file 
  