_GEN_APPROX_ANY = (
    # VOWELS
    # "ALL" DIPHTHONGS are interchangeable BETWEEN THEM and with monophthongs of which they are composed ("D" means "diphthong")  # noqa: E501
    # {a,o} are totally interchangeable if non-stressed; in German "a/o" can actually be from "ä/ö" (that are equivalent to "e")  # noqa: E501
    # {i,e} are interchangeable if non-stressed, while in German "u" can actually be from "ü" (that is equivalent to "i")  # noqa: E501