DECLARE SUB place (which!)
CLEAR , , 25000
DIM SHARED word(20) AS STRING * 5, grid(9, 9) AS STRING * 1, used(20)
FOR i = 1 TO 20: READ word(i): NEXT
DATA dance,donor,dress,enter,fight
DATA fleas,flood,hauls,hoist,rival
DATA shear,short,since,steel,their
DATA tough,tread,trial,truss,trust

DIM SHARED coord(20, 4), max
DATA 1,1,1,5
DATA 1,5,1,9
DATA 1,1,5,1
DATA 1,5,5,5
DATA 1,9,5,9
DATA 1,1,5,5
DATA 1,5,5,1
DATA 1,5,5,9
DATA 1,9,5,5
FOR i = 1 TO 9
 READ coord(i, 1), coord(i, 2), coord(i, 3), coord(i, 4)
 coord(i + 9, 1) = coord(i, 1) + 4
 coord(i + 9, 2) = coord(i, 2)
 coord(i + 9, 3) = coord(i, 3) + 4
 coord(i + 9, 4) = coord(i, 4)
NEXT
coord(19, 1) = 9: coord(19, 2) = 1
coord(19, 3) = 9: coord(19, 4) = 5
coord(20, 1) = 9: coord(20, 2) = 5
coord(20, 3) = 9: coord(20, 4) = 9

FOR row = 1 TO 9
FOR col = 1 TO 9
grid(row, col) = " "
NEXT
NEXT

CLS

place 1

PRINT max

END

SUB place (which)
  DIM sg$(5)
  IF which > max THEN max = which
  r1 = coord(which, 1)
  c1 = coord(which, 2)
  r5 = coord(which, 3)
  c5 = coord(which, 4)
  FOR i = 1 TO 20
   IF used(i) = 0 THEN
    used(i) = 1
    IF LEFT$(word(i), 1) = grid(r1, c1) OR grid(r1, c1) = " " THEN
    IF RIGHT$(word(i), 1) = grid(r5, c5) OR grid(r5, c5) = " " THEN
     deltaRow = SGN(r5 - r1): deltaCol = SGN(c5 - c1)
    IF MID$(word(i), 3, 1) = grid(r1 + 2 * deltaRow, c1 + 2 * deltaCol) OR grid(r1 + 2 * deltaRow, c1 + 2 * deltaCol) = " " THEN
      FOR j = 1 TO 5
        sg$(j) = grid(r1 + (j - 1) * deltaRow, c1 + (j - 1) * deltaCol)
        grid(r1 + (j - 1) * deltaRow, c1 + (j - 1) * deltaCol) = MID$(word(i), j, 1)
      NEXT
      IF which = 20 THEN
        FOR row = 1 TO 9
        FOR col = 1 TO 9
          IF grid(row, col) = " " THEN PRINT "-"; :  ELSE PRINT grid(row, col);
        NEXT
        PRINT
        NEXT
        PRINT
       ELSE
        place which + 1
      END IF
      FOR j = 1 TO 5
         grid(r1 + (j - 1) * deltaRow, c1 + (j - 1) * deltaCol) = sg$(j)
      NEXT

    END IF
    END IF
    END IF
    used(i) = 0
   END IF
  NEXT
END SUB

finds

fightough
ll-rrr-ao
o-e-u-u-i
oa-asl-ss
dresshort
ao-iht-hr
n-n-e-e-i
cc-oai-ea
enterival