:
s/\(...\)\(.*\n\)\(...\)\(.*\n\)\(...\)/1\1\3\5\n\n\2\4/m
s/\(\(.\)\([ _|]\{9\}\).*\)1\3/\1\2/
t
/1/y/1324576890/0132457689/
$s/[ _|]*\n\n//g
N
b