diff --git a/index.js b/index.js
index fa5770c..8c05ba8 100644
--- a/index.js
+++ b/index.js
@@ -2084,12 +2084,12 @@ function processCommandLines(action, command, commandlines) {
 
         if (command === "blocks") {
             if (arg[0] !== "*" && arg[arg.length - 1] === "*") {
-                addQueryLines(command, prefix, "arg_blockcontent_startswith", arg.substring(1));
+                addQueryLines(command, prefix, "arg_blockcontent_startswith", arg.substring(0, arg.length - 1));
                 continue;
             }
 
             if (arg[0] === "*" && arg[arg.length - 1] !== "*") {
-                addQueryLines(command, prefix, "arg_blockcontent_endswith", arg.substring(0, arg.length - 1));
+                addQueryLines(command, prefix, "arg_blockcontent_endswith", arg.substring(1));
                 continue;
             }