Question

Akhil is very good at string manipulation.One day a professor gave him a challenge to solve. The challenge isvery simple. Find the number of strings of length N where each string must contain only first four alphabets ofenglish literature. To make the question harder he also give M strings. These M strings should not be presentas substrings.Note : Since some times the ans is large perform modulo 1000000007​

Answer 1

Answer:

Sorry I didn't no the answer of your question