# DECnet hacking
BEGIN {
n = 0
sdecnet = "aa:0:4:"
ldecnet = length(sdecnet)
}
{
++n
e[n] = $1
h[n] = $2
if (sdecnet == substr($1, 1, ldecnet))
decnet[$2] = 1
}
END {
for (i = 1; i <= n; ++i) {
if (decnet[h[i]] && sdecnet != substr(e[i], 1, ldecnet))
h[i] = h[i] "-ip"
print e[i] "\t" h[i]
}
}