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#!/usr/bin/awk -f
function trace_to_com(xs, o)
{
if (o == "COM")
return
o = orbits[o]
xs[length(xs) + 1] = o
trace_to_com(xs, o)
}
BEGIN { FS = ")" }
{ orbits[$2] = $1 }
END {
# Declare ‘xs’ and ‘ys’ as arrays
xs[0]; delete xs
ys[0]; delete ys
trace_to_com(xs, "YOU")
trace_to_com(ys, "SAN")
for (i = 1; i <= length(xs); i++) {
for (j = 1; j <= length(ys); j++) {
if (xs[i] == ys[j]) {
print i + j - 2
exit
}
}
}
}
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