Please write a PYTHON program to do this

A bigram is a sequence of two adjacent letters in a string. For example, the phrase "this may be"contains the following bigrams:th, hi, is, ma, ay, be.

1.Process the plain text filewells.txtby removing the non-alphabetic symbols and lowercasing all letters.

2.Extract the 10 most-frequent bigrams and their counts from the processed text.

3.Identify the English words in the filewordlist.txtthat contain all of the 4 most frequent bigrams.