how may four letter words can be formed using het letters of the word FAILURE so that F is included in each word? F is not include in any word?

Explanation

To solve the problem, we will break it down into two parts as specified in the question.

### Part 1: How many 4-letter words can be formed using the letters of the word "FAILURE" such that F is included in each word?

1. **Identify the letters in "FAILURE":**
The letters are F, A, I, L, U, R, E. There are a total of 7 different letters.

2. **Fix the letter F:**
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