55000 REM FIND ALL USR
 55010 PRINT:F=2816
 55020 Q=PEEK(F):IF Q=0 GOTO 55100
 55030 IF Q=176 THEN PRINT"USR IN LINE"PEEK(L+3)+PEEK(L+4)*256
 55040 F=F+1:GOTO 55020
 55100 IF PEEK(F+3)=216 AND PEEK(F+4)=214 GOTO 55200
 55110 L=F:F=F+5:GOTO 55020
 55200 PRINT:PRINT" ALL DONE!":END