10 REM Morse code
20 DIM c$(54)
30 FOR f = 1 TO 54
40 READ l$, m$
50 LET d$ = d$ + l$ : LET c$(f) = m$
60 NEXT f

100 LINE INPUT "Message? " t$
105 t$ = upper$(t$)
110 FOR f = 1 TO LEN(t$)
120 p = INSTR(d$, mid$(t$, f, 1))
130 IF p > 0 then
        PRINT c$(p);
    else
        print "?";
    end if
140 NEXT f
print
goto 100


1000 DATA "A","._","B","_...","C","_._.","D","_..","E",".","F",".._."
1010 DATA "G","__.","H","....","I","..","J",".___","K","_._","L","._.."
1020 DATA "M","__","N","_.","O","___","P",".__.","Q","__._","R","._."
1030 DATA "S","...","T","_","U",".._","V","..._","W",".__","X","_.._"
1040 DATA "Y","_.__","Z","__..","1",".____","2","..___","3","...__"
1050 DATA "4","...._","5",".....","6","_....","7","__...","8","___.."
1060 DATA "9","____.","0","_____",".","._._._",",","__..__","?","..__.."
1070 DATA "'",".____.","!","_._.__","/","_.._.","(","_.__.",")","_.__._"
1080 DATA "&","._...",":","___...",";","_._._.","=","_..._","+","._._.","-","_...._"
1090 DATA "_","..__._","\"","._.._.","$","..._.._","@",".__._."