INPUT q$
INPUT w$
 
FOR i = 1 TO LEN(q$)
  FOR j = 1 TO LEN(w$)
    IF Mid(q$, i, 1) = Mid(w$, j, 1) THEN
      IF INSTR(q$, Mid(q$, i, 1)) >= i THEN
        PRINT Mid(q$, i, 1)
        EXIT FOR
      END IF
    END IF
  NEXT j
NEXT i