awk subtraction and print output

cdfd123 · July 28, 2010, 3:17am

FileA
F97S 83 530
K569E 531 736

output shud be
F16S
K40E

it is code

sed 's/[A-Z]//g' FileA |awk '{print $1-$2+2}'

it will print
16
40
anything can come with this output??

Scott · July 28, 2010, 3:27am

$ sed "s/[A-Z][A-Z]*/ & /g" file1 | awk '{print $1 $2-$4+2 $3}'