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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def merge_split_alignments(data):
 """Merge split BAM inputs generated by common workflow language runs. """

    data = utils.to_single_data(data)
    data = _merge_align_bams(data)
    data = _merge_hla_fastq_inputs(data)
    return [[data]]