pythonchallenge1_v1

#!/usr/bin/python
import string

sentence = "g fmnc wms bgblr rpylqjyrc gr zw fylb. \
rfyrq ufyr amknsrcpq ypc dmp. \
bmgle gr gl zw fylb gq glcddgagclr ylb rfyr\'q ufw rfgq rcvr gq qm jmle. \
sqgle qrpgle.kyicrpylq() gq pcamkkclbcb. lmu ynnjw ml rfc spj."
mylist = []

for i in sentence:
    if i in string.lowercase:
        num = (string.lowercase.index(i)+2)
        if num < 26:
            mylist.append(string.lowercase[num])
        else:
            mylist.append(string.lowercase[num-26])
    else:
        mylist.append(i)
print(''.join(mylist))