FOR a=0 TO 9
   FOR b=0 TO 9
      FOR c=0 TO 9
         FOR d=0 TO 9
            FOR e=0 TO 9
               FOR f=0 TO 9
                  FOR g=0 TO 9
                     FOR h=0 TO 9
                        FOR i=0 TO 9
                           FOR j=0 TO 9 
                              PRINT a;b;c;d;e;f;g;h;i;j
10                         NEXT j
20                      NEXT i
30                   NEXT h
40                NEXT g
50              NEXT f
60          NEXT e
70       NEXT d
80    NEXT c
90 NEXT b
NEXT a
END