replace pattern after the first pattern match


 
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# 1  
Old 11-08-2011
replace pattern after the first pattern match

I need this.
Code:
aaa
OOOOO
bbb
ccc
OOOOO
ddd
fff
ggg
OOOOO
iii
OOOOO

I need all OOOOO replaced with PPPPP, but only change after the pattern ggg. So the first two OOOOO should not be changed.

OUTPUT should be :-
Code:
aaa
OOOOO
bbb
ccc
OOOOO
ddd
fff
ggg
PPPPP
iii
PPPPP

# 2  
Old 11-08-2011
Is this homework?
# 3  
Old 11-08-2011
Maybe with sed.

man sed

Regards.
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