Fix comment in viterbi decoding
Fix comment in viterbi decoding

yanqingmen/Wapiti,yanqingmen/Wapiti,yanqingmen/Wapiti,Jekub/Wapiti,Neseb/wapiti,yanqingmen/Wapiti,yanqingmen/Wapiti,Neseb/wapiti,Jekub/Wapiti