code: def count_mismatches_after_variant(reference_suffix, cdna_suffix):
      
  
      len_diff = len(cdna_suffix) - len(reference_suffix)
  
      # if the reference is shorter than the read, the read runs into the intron - these count as
      # mismatches
      return sum(xi != yi for (xi, yi) in zip(reference_suffix, cdna_suffix)) + max(0, len_diff)
docs: Computes the number of mismatching nucleotides between two cDNA sequences after a variant locus.
  
      Parameters
      ----------
      reference_suffix : str
          cDNA sequence of a reference transcript after a variant locus
  
      cdna_suffix : str
          cDNA sequence detected from RNAseq after a variant locus