st-NEET:~ j05043$ server2
now waiting for client connect
Connected from 127.0.0.1

st-NEET:~ j05043$ client2
Connected.
Input Keyword = warning: this program uses gets(), which is unsafe.
123
Keyword = [123] / Data = [456]

Input Keyword = xyz
Keyword = [xyz] / Data = [XYZ]

Input Keyword = xxxx
Keyword = [xxxx] / Data = [yyyy]

Input Keyword = 
Disocnnected.