1 4 2 IF 3 ELSE 4 END_IF 5 ENDPROGRAM 6 IF 7 S 8 ELSE 9 END_IF 10 IF 11 ELSE 12 S 13 END_IF 14 ENDPROGRAM 15 S 16 S 17 S 18 ENDPROGRAM 19 S 20 IF 21 S 22 S 23 ELSE 24 IF 25 IF 26 S 27 ELSE 28 S 29 END_IF 30 S 31 ELSE 32 S 33 END_IF 34 END_IF 35 S 36 ENDPROGRAM 37