Oðblgshezi (pronounced oth-bleg-SHEH-zi) is a "language" based on English words that can be typed with the digits of a calculator. "Letters" are keyed in and the words read by turning the calculator upside down. The longest words using the nine available letters from traditional English alphabet (I, Z, E, h, S, G, L, B and O) are ILLEGIBLE and EGGShELLS;however, the language's creators have introduced a 10th letter – the Anglo Saxon eth or ð, using the numeral 9) - to present a TH sound, which means that the longest possible word in SHIBBOLð ("shibboleth", a custom, practice or dialect particular to a regional or social group). The word Oðblgshezi is derived from the numerals 1234567890, and was coined by "conlanger" (constructed-language creator) Jeffrey Henning, creator of langmaker.com