import re
input = raw_input()
output = re.sub(r'^(.{4})(.{4})(.{3})(.{3})', r'\1\4\2\3', input)
print output
aW1wb3J0IHJlCmlucHV0ID0gcmF3X2lucHV0KCkKb3V0cHV0ID0gcmUuc3ViKHInXiguezR9KSguezR9KSguezN9KSguezN9KScsIHInXDFcNFwyXDMnLCBpbnB1dCkKcHJpbnQgb3V0cHV0