ref: 8f70fbf6f843054cdec3a9c4fe044aceabc6ff8c
dir: /graveyard/hdup/
#!/bin/rc
awk '
{
if(a[n] != $1){
n++
a[n] = $1
a[n,1] = 0
s[$1] = $2
}else{
s[$1] = s[$1] " " $2
a[n,1] = 1
}
}
END{
for(i=1; i<n; i++){
if(a[i,1] == 1)
print s[a[i]]
}
}
' $*