--- main_loop.bak	2022-10-01 08:40:34.740558153 +0200
+++ main_loop.c	2022-10-02 08:34:00.129357959 +0200
@@ -488,11 +488,20 @@
 static int exec_command( const char ** const ibufpp, const int prev_status,
                          const bool isglobal )
   {
+  /* HG */
+  char *s;
+  static char obufp['z' - 'a' +1][30];
+  /* HG. */
   const char * fnp;				/* filename */
-  int pflags = 0;				/* print suffixes */
+  int pflags;
+  int addr_cnt;
   int addr, c, n;
-  const int addr_cnt = extract_addresses( ibufpp );
 
+/* HG */
+start:
+/* HG. */
+  addr_cnt = extract_addresses( ibufpp );
+  pflags = 0;				/* print suffixes */
   if( addr_cnt < 0 ) return ERR;
   *ibufpp = skip_blanks( *ibufpp );
   c = *(*ibufpp)++;
@@ -598,6 +607,20 @@
               if( !move_lines( first_addr, second_addr, addr, isglobal ) )
                 return ERR;
               break;
+    case 'o': c= *(*ibufpp)++;
+              if( c < 'a' || c > 'z') return ERR;
+              s= obufp[c - 'a'];
+              if(  **ibufpp == '\n' ){
+                printf("%s",s);
+                *ibufpp= s;
+                goto start;
+              }
+              for( n=0;; n++ ){
+                if( n>= (int) sizeof obufp[0] ) return ERR;
+                s[n]= *(*ibufpp)++;
+                if(s[n] == '\0') break;
+              }
+              break;
     case 'P':
     case 'q':
     case 'Q': if( unexpected_address( addr_cnt ) ||