diff --git a/Lab04/code/part01-analyze/main.go b/Lab04/code/part01-analyze/main.go
index 6becc39..9e590d2 100644
--- a/Lab04/code/part01-analyze/main.go
+++ b/Lab04/code/part01-analyze/main.go
@@ -112,7 +112,8 @@ func plotResult() {
 
 func main() {
 	initLetterStruct()
-	totalCount := countLetters(readFile("plaintext.txt"))
+	//totalCount := countLetters(readFile("plaintext.txt"))
+	totalCount := countLetters(readFile("../part01-encrypt/output.txt"))
 	calculateFrequency(totalCount)
 	plotResult()
 	sort.Sort(letterList(letters))