Tnzyl-syt-jwlaqy ›

obamg gbh bjzodq → no. Try ROT5 on group1: tnzyl → y s e d q? No.

j=10+13=23→w; w=23+13=36-26=10→j; l=12+13=25→y; a=1+13=14→n; q=17+13=30-26=4→d; y=25+13=38-26=12→l → "wj yndl" tnzyl-syt-jwlaqy

Full ROT13: (still not English). 4. Try reverse string + ROT13 or Atbash Reverse: yqalwj-tys-lznyt obamg gbh bjzodq → no

s=19+13=32-26=6→g; y=25+13=38-26=12→l; t=20+13=33-26=7→g → "glg" t=20+13=33-26=7→g → "glg"