Fixed Python 2.x/3.x Compatibility

Changed all raw_input to modified_input via search and replace.
Added in
try:  # Fix Python 2.x.
if sys.version_info>=(3,0):
modified_input = input
print("Python 3.x Compatible!")
else:
modified_input=raw_input
except NameError:
pass
which makes modified_input use raw_input if less than version 3.0 and
input if version 3.0 or greater.