diff --git a/user/app2/appl.cc b/user/app2/appl.cc
index 4ad98ea..f97c775 100644
--- a/user/app2/appl.cc
+++ b/user/app2/appl.cc
@@ -8,7 +8,9 @@ void main() {
     fork();
     int ppid = sys_getpid();
     int other = fork();
-    //write(1, "app", 3, 0, ppid);
+
+    int pid = sys_getpid();
+    write(1, "app", 3, 0, pid);
     if (ppid == other) { // child
         sbuf[0] = 3;
         sbuf[8192] = sys_getpid();
@@ -18,7 +20,7 @@ void main() {
         char msg[] = "REPLY: AA\n";
         msg[7] += rbuf[0] + sbuf[8193];
         msg[8] += 4 + ppid;
-        write(0, msg, 10);
+        write(0, msg, 10, 20, pid);
     } else { // parent
       //  int X = recv(rbuf, 8193);
         receive(rbuf, 8193);