Chap5Q8.py

f1 = open('LOWER.txt', 'w')
f2 = open('UPPER.txt', 'w')
f3 = open('OTHERS.txt', 'w')

c = True
while c:
    c = input('Enter a character to write or exit to terminate the program : ')
    if c=='exit':
        break
    elif c.islower(): # checks for lower character
        f1.write(c)
    elif c.isupper(): # checks for upper character
        f2.write(c)
    else:
        f3.write(c)