from typing import Tuple


def bbox2str(bbox: Tuple[float, float, float, float]) -> str:
    """Return a string representation suited for hOCR.

    :param bbox: a bounding box (left, top, right, bottom)
    :return: a string representation for hOCR
    """
    (x0, y0, x1, y1) = bbox
    return f"bbox {int(x0)} {int(y0)} {int(x1)} {int(y1)}"