def combine_range(lines, start, end):
    """Join content from a range of lines between start and end"""
    (srow, scol), (erow, ecol) = start, end
    if srow == erow:
        return lines[srow - 1][scol:ecol], end
    rows = [lines[srow - 1][scol:]] + lines[srow:erow - 1] + [lines[erow - 
        1][:ecol]]
    return ''.join(rows), end
