#
# Translate a string into Morse code; ignore anything other than letters,
# numbers, period, and comma
#
# Matt Bishop, ECS 10, Fall 2012

#
# dictionary mapping characters into Morse code
#
morse = {
"A" : ".-",     "B" : "-...",   "C" : "-.-.",   "D" : "-..",    "E" : ".", 
"F" : "..-.",   "G" : "--.",    "H" : "....",   "I" : "..",     "J" : ".---", 
"K" : "-.-",    "L" : ".-..",   "M" : "--",     "N" : "-.",     "O" : "---", 
"P" : ".--.",   "Q" : "--.-",   "R" : ".-.",    "S" : "...",    "T" : "-", 
"U" : "..-",    "V" : "...-",   "W" : ".--",    "X" : "-..-",   "Y" : "-.--", 
"Z" : "--..", 

"0" : "-----",  "1" : ".----",  "2" : "..---",  "3" : "...--",  "4" : "....-", 
"5" : ".....",  "6" : "-....",  "7" : "--...",  "8" : "---..",  "9" : "----.", 

"." : ".-.-.-", "," : "--..--", "?" : "..--..", "'" : ".----.", "!" : "-.-.--",
"/" : "-..-.",  "(" : "-.--.",  ")" : "-.--.-", "&" : ".-...",  ":" : "---...",
";" : "-.-.-.", "=" : "-...-",  "+" : ".-.-.",  "-" : "-....-", "_" : "..--.-",
'"' : ".-..-.", "$" : "...-..-","@" : ".--.-."
}
# unknown char: anything else is printed as this
unk = "X"
# separator to separate Morse representation of characters
sep = "/"

#
# loop doing the translation until an EOF
while True:
    #
    # read the input, quitting on an exception
    #
    try:
        inp = input("enter string: ")
    except EOFError:
        break
    except Exception as msg:
        # no idea what caused this, so give the error message
        print(msg)
        break
    #
    # now do the translation
    # note all letters get mapped into upper case
    #
    for c in inp:
        print(morse.get(c.upper(), unk), end=sep)
    print('')