code: def chr22XY(c):
      
      c = str(c)
      if c[0:3] == 'chr':
          c = c[3:]
      if c == '23':
          c = 'X'
      if c == '24':
          c = 'Y'
      return 'chr' + c
docs: force to name from 1..22, 23, 24, X, Y, M 
      to in chr1..chr22, chrX, chrY, chrM
      str or ints accepted
  
      >>> chr22XY('1')
      'chr1'
      >>> chr22XY(1)
      'chr1'
      >>> chr22XY('chr1')
      'chr1'
      >>> chr22XY(23)
      'chrX'
      >>> chr22XY(24)
      'chrY'
      >>> chr22XY("X")
      'chrX'
      >>> chr22XY("23")
      'chrX'
      >>> chr22XY("M")
      'chrM'