def Get5prime(splitline):
    """Find 5' position of read."""
    strand = splitline[1]
    chr = splitline[2]
    pos = splitline[3]
    seq = splitline[4]
    if (strand == '+'):
        pass
    else:
        size = len(seq)
        pos = str(int(pos) + size - 1)
    return(pos)