10 PRINT "ENTER TWO NUMBERS, SEPARATED BY A SPACE: ";
20 INPUT X$
30 I = 1 : N = LEN(X$)
40 IF MID$(X$,I,1)<>" " AND I<N THEN I = I+1 : GOTO 40
50 A = VAL(LEFT$(X$,I))
60 B = VAL(RIGHT$(X$,N-1))
70 PRINT A+B