Traceback (most recent call last):
  File "/home/zihad/PycharmProjects/BanglaAnalysis/app.py", line 37, in <module>
    main()
  File "/home/zihad/PycharmProjects/BanglaAnalysis/app.py", line 18, in main
    POSTagger().start()
  File "/home/zihad/PycharmProjects/BanglaAnalysis/hmm/POS.py", line 229, in start
    res = POS(trimming(qq))
  File "/home/zihad/PycharmProjects/BanglaAnalysis/hmm/POS.py", line 210, in POS
    result.append(dir[i][a1][a2])
KeyError: '-'