diff --git a/server-ltt.sh b/server-ltt.sh
index 58f151a..d1bb885 100755
--- a/server-ltt.sh
+++ b/server-ltt.sh
@@ -74,8 +74,8 @@ do
         echo "Correct user format: user=<uuid>[:level:email]"
         echo "Like: user=805b2209-c26f-48d6-ba52-07b7d894f962:0:me@g.cn"
         echo "Like: user=805b2209-c26f-48d6-ba52-07b7d894f962::me@g.cn"
-        echo "user=805b2209-c26f-48d6-ba52-07b7d894f962:0"
-        echo "user=805b2209-c26f-48d6-ba52-07b7d894f962"
+        echo "Like: user=805b2209-c26f-48d6-ba52-07b7d894f962:0"
+        echo "Like: user=805b2209-c26f-48d6-ba52-07b7d894f962"
         exit 1
     fi
     if [ -z "${uopt[1]}" ]; then
diff --git a/server-lttw.sh b/server-lttw.sh
index 6b57746..1df759a 100755
--- a/server-lttw.sh
+++ b/server-lttw.sh
@@ -83,8 +83,8 @@ do
         echo "Correct user format: user=<uuid>[:level:email]"
         echo "Like: user=805b2209-c26f-48d6-ba52-07b7d894f962:0:me@g.cn"
         echo "Like: user=805b2209-c26f-48d6-ba52-07b7d894f962::me@g.cn"
-        echo "user=805b2209-c26f-48d6-ba52-07b7d894f962:0"
-        echo "user=805b2209-c26f-48d6-ba52-07b7d894f962"
+        echo "Like: user=805b2209-c26f-48d6-ba52-07b7d894f962:0"
+        echo "Like: user=805b2209-c26f-48d6-ba52-07b7d894f962"
         exit 1
     fi
     if [ -z "${uopt[1]}" ]; then
diff --git a/server-ltx.sh b/server-ltx.sh
index 4faafb0..2b61104 100755
--- a/server-ltx.sh
+++ b/server-ltx.sh
@@ -74,8 +74,8 @@ do
         echo "Correct user format: user=<uuid>[:level:email]"
         echo "Like: user=805b2209-c26f-48d6-ba52-07b7d894f962:0:me@g.cn"
         echo "Like: user=805b2209-c26f-48d6-ba52-07b7d894f962::me@g.cn"
-        echo "user=805b2209-c26f-48d6-ba52-07b7d894f962:0"
-        echo "user=805b2209-c26f-48d6-ba52-07b7d894f962"
+        echo "Like: user=805b2209-c26f-48d6-ba52-07b7d894f962:0"
+        echo "Like: user=805b2209-c26f-48d6-ba52-07b7d894f962"
         exit 1
     fi
     if [ -z "${uopt[1]}" ]; then
diff --git a/server-mtt.sh b/server-mtt.sh
index 4910248..6b8aa10 100755
--- a/server-mtt.sh
+++ b/server-mtt.sh
@@ -74,8 +74,8 @@ do
         echo "Correct user format: user=<uuid>[:level:email]"
         echo "Like: user=805b2209-c26f-48d6-ba52-07b7d894f962:0:me@g.cn"
         echo "Like: user=805b2209-c26f-48d6-ba52-07b7d894f962::me@g.cn"
-        echo "user=805b2209-c26f-48d6-ba52-07b7d894f962:0"
-        echo "user=805b2209-c26f-48d6-ba52-07b7d894f962"
+        echo "Like: user=805b2209-c26f-48d6-ba52-07b7d894f962:0"
+        echo "Like: user=805b2209-c26f-48d6-ba52-07b7d894f962"
         exit 1
     fi
     if [ -z "${uopt[1]}" ]; then
diff --git a/server-mttw.sh b/server-mttw.sh
index e0d6f47..5a6e6ba 100755
--- a/server-mttw.sh
+++ b/server-mttw.sh
@@ -83,8 +83,8 @@ do
         echo "Correct user format: user=<uuid>[:level:email]"
         echo "Like: user=805b2209-c26f-48d6-ba52-07b7d894f962:0:me@g.cn"
         echo "Like: user=805b2209-c26f-48d6-ba52-07b7d894f962::me@g.cn"
-        echo "user=805b2209-c26f-48d6-ba52-07b7d894f962:0"
-        echo "user=805b2209-c26f-48d6-ba52-07b7d894f962"
+        echo "Like: user=805b2209-c26f-48d6-ba52-07b7d894f962:0"
+        echo "Like: user=805b2209-c26f-48d6-ba52-07b7d894f962"
         exit 1
     fi
     if [ -z "${uopt[1]}" ]; then