diff --git a/fuzzer/Instruction.java b/fuzzer/Instruction.java
index e6bb0d021d540b21e9f3d7a8a533f12b5e63723e..8608385a4d525cf8013172ce141eae9683d6e4ca 100644
--- a/fuzzer/Instruction.java
+++ b/fuzzer/Instruction.java
@@ -28,7 +28,7 @@ public enum Instruction {
         }
         return grammar;
     }
-    
+
     private final String opcode;
     private final OperandType[] operands;
 
@@ -40,7 +40,7 @@ public enum Instruction {
     public String getOpcode(){
         return opcode;
     }
-    
+
     public OperandType[] getOperands(){
         return operands;
     }
@@ -52,5 +52,30 @@ public enum Instruction {
         }
         return "\"" + opcode + "\"" + operandsString;
     }
-    
+
+    public Instruction fromStringToInstruction(String input) {
+        int end_command = input.indexOf(" ");
+
+        String command = "";
+        if (end_command != -1) {
+            command += input.substring(0, end_command);
+        }
+
+        if (command == "put") {
+            return Instruction.PUT;
+        } else if (command == "get") {
+            return Instruction.GET;
+        } else if (command == "rem") {
+            return Instruction.REM;
+        } else if (command == "save") {
+            return Instruction.SAVE;
+        } else if (command == "list") {
+            return Instruction.LIST;
+        } else if (command == "masterpw") {
+            return Instruction.MASTERPW;
+        }
+
+        return null;
+    }
+
 }