Sires in validation and Sires in training

I want to test metafounders for genomic selection. So I have these MTR sires that have daughters in the validation , in the training, or in both of them, and I want a file with these numbers. I have two files:

T is:
juan 10
pepe 5

V is:

luis 6
pepe 4

so luis has no daughters on Training, and I want this to appear. Then I use this pipeline from Toni Reverter from CSIRO:

awk '{print $1}' $1 $2 | sort -u | join -a1 - $1 | awk '{print $1, (NF==2?$2:0)}' | join -a1 - $2 | awk '{print $1, $2, (NF==3?$3:0)}'

which gives

putterri:yarp andres$ ./joinToni.sh V T

juan 0 10

luis 6 0

pepe 4 5