diff --git a/27-01-2021-grepString/grepUmaJwtTokenPrvider.sh b/27-01-2021-grepString/grepUmaJwtTokenPrvider.sh
index 8187486..b869e93 100644
--- a/27-01-2021-grepString/grepUmaJwtTokenPrvider.sh
+++ b/27-01-2021-grepString/grepUmaJwtTokenPrvider.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
-out=`find . -name '*.java' -exec grep 'UmaJwtToken' /dev/null {} +`
-if [[ -n "${out}" ]]; then
+out=`find . -name '*.java' -exec grep 'UmaJwtToken' /dev/null {} + || echo 'empty'`
+if [[ ["${out}" != "empty"] && "$(grep '\.java' <<< ${out})" ]]; then
     echo "UmaJwtToken class found in "
     echo "${out}"
 else