Atish Jena slammed a dazzling century to help Orissa take a 136-run first innings lead on the second day of their four-day East Zone C K Nayudu Trophy under-22 league match against Tripura at Agartala on Friday. Resuming at the overnight score of 75 for five, Orissa were all out for 244. Host Tripura, who were bundled out for 108 in the first innings, finished the day, making 54 for three in the second innings. Brief scores: Tripura 108 and 54/3 (Alok Pradhan 2/7) vs Orissa 244 (Atish Jena 103, Ansuman Gope 44: Rakesh Sharma 7/68, Dilip Singh 3/70).