def check(n):
d = 0
if n%2==0:
d = 1
return d
e = 1
while e == 1:
a = input("What number shall we start at? ")
print e
b = input("What number shall we stop at? ")
c = raw_input("Shall we display odds, evens, or both? ")
b = b + 1
print 'If you would like to stop, type in 0 for both numbers and none for what we shall display.'
if a == 0 and b == 0:
e = 0
break
if c == 'even' or c == 'evens':
for n in range(a, b):
if check(n) == 1:
print n, 'is even.'
if c == 'odd' or c == 'odds':
for n in range(a, b):
if check(n) == 0:
print n, 'is odd.'
if c == 'both':
for n in range(a, b):
if check(n) == 1:
print n, 'is even.'
if check(n) == 0:
print n, 'is odd.'