bash_file_mass

FILES=/nfs/slac/g/ldmx/users/giulia/data/sig/*
do
    echo $f
    t=$(echo $f | cut -d'A' -f 3)
    u=$(echo $t | cut -d'.' -f 2)
    z=$(echo $t | cut -d'.' -f 3)
    echo $u.$z
done