two string word1 word2 consider equivalent difference frequency letter z word1 word2 3given string word1 word2 length n return true word1 word2 equivalent false otherwisethe frequency letter x number time occur stre example 1input word1 aaaa word2 bccboutput falseexplanation there 4 aaaa 0 bccbthe difference 4 allow 3example 2input word1 abcdeef word2 abaaaccoutput trueexplanation the difference frequency letter word1 word2 3 appear 1 time word1 4 time word2 the difference 3 b appear 1 time word1 1 time word2 the difference 0 c appear 1 time word1 2 time word2 the difference 1 d appear 1 time word1 0 time word2 the difference 1 e appear 2 time word1 0 time word2 the difference 2 f appear 1 time word1 0 time word2 the difference 1example 3input word1 cccddabba word2 bababababoutput trueexplanation the difference frequency letter word1 word2 3 appear 2 time word1 4 time word2 the difference 2 b appear 2 time word1 5 time word2 the difference 3 c appear 3 time word1 0 time word2 the difference 3 d appear 2 time word1 0 time word2 the difference 2 Constraintsn word1length word2length1 n 100word1 word2 consist lowercase english letter