server: client 1 just arrived
client 1: on short line
server: client 2 just arrived
server: client 2 just arrived
client 2: line 1
client 2: line 1
client 2: line 2
client 2: line 2
client 2: 
client 2: 
client 2: line 4
client 2: line 4
server: client 3 just arrived
server: client 3 just arrived
server: client 3 just arrived