def f(s):
g=lambda(a,b):lambda c:a<c.lower()<b
for f in g('`n'),g('m{'):
t='';u=filter(f,s)[-1:]
for c in s:
if f(c):c,u=u,c
t=c+t
s=t
print s
f('Hello_World')
ZGVmIGYocyk6CiAgZz1sYW1iZGEoYSxiKTpsYW1iZGEgYzphPGMubG93ZXIoKTxiCiAgZm9yIGYgaW4gZygnYG4nKSxnKCdteycpOgogICB0PScnO3U9ZmlsdGVyKGYscylbLTE6XQogICBmb3IgYyBpbiBzOgogICAgaWYgZihjKTpjLHU9dSxjCiAgICB0PWMrdAogICBzPXQKICBwcmludCBzCiAgCmYoJ0hlbGxvX1dvcmxkJyk=