while 1: a=input() if a[-1]=='1'and a[-2:]!='11':print(a+'st') elif a[-1]=='2'and a[-2:]!='12':print(a+'nd') elif a[-1]=='3'and a[-2:]!='13':print(a+'rd') else:print(a+'th')
Note that non-ascii characters in the above source code will be escaped (such as \x9f).