In a code language, MILITARY is written as ATCVKNKO. How will DISORDER be written as in that language?

Here MILITARY is coded as ATCVKNKO. The place value of M=13, I=9, L=12, I=9, T=20, A=1, R=18, Y=25. Now in the coded word it is represented by adding 2 with each place value i.e; M=15, I=11, L=14, I=11, T=22, A=3, R=20, Y=27. Now as there are 26 letters so 27 is represented by A. And after adding 2 we write in reverse order from right to left as ATCVKNKO. Similarly, place value of letters of DISORDER are D=4, I=9, S=19, O=15, R=18, D=4, E=5, R=18. Now if we add 2 with each place value and write it in reverse order from right to left then the number arrangement will be 20,7,6,20,17,21,11,6 and if we put corresponding letters then it will be TGFTQUKF.