PROC.1 This line is being written by process #1.
PROC.2 This line is being writtPROC.1 This line is being written by process #1.
en by process #2.
PROC.3 This line is beinPROC.4 This line is being written by process #4.
g written by pPROC.1 This line is being written by process #1.
rocess #3.