names = ['chen zhuo', 'yin wenfeng', 'wei ting', 'zhang wei']
message_chen = names[0].title() + ": Happy birthday!"
message_yin = names[1].title() + ": Happy birthday!"
message_wei = names[2].title() + ": Happy birthday!"
message_zhang = names[3].title() + ": Happy birthday!"
print(message_chen)
print(message_yin)
print(message_wei)
print(message_zhang)