element of one glyph would replace part of a second. In place of the standard block configuration, Maya was also sometimes written in a single row or column, or in an 'L' or 'T' shape. These variations most often appeared when they would better fit the surface being inscribed. The Maya script was a logosyllabic system with some syllabogrammatic elements. Individual glyphs or symbols could represent either a morpheme or a syllable, and the same glyph could often be used for both. Because of these dual readings, it is customary to write logographic readings in all caps and phonetic readings in italics or bold. For example, a calendaric glyph can be read as the morpheme or as the syllable chi. Glyphs used as syllabograms were originally logograms for single-syllable words, usually those that ended in a vowel or in a weak consonant such as y, w, h, or glottal stop. For example, the logogram for 'fish fin'—found in two forms, as a fish fin and as a fish with prominent fins—was read as [kah] and came to represent the syllable ka. These syllabic glyphs performed two primary functions: as phonetic complements to disambiguate logograms which had more than one reading (similar to ancient Egyptian and modern Japanese furigana); and to write grammatical elements such as verbal inflections which did not have dedicated logograms (similar to Japanese okurigana). For example, bʼalam 'jaguar' could be written as a single logogram, ; a logogram with syllable additions, as ba-, or -ma, or bʼa--ma; or written completely phonetically with syllabograms as bʼa-la-ma. In addition, some syllable glyphs were homophones, such as the six different glyphs used to write the very common third person pronoun u-. Harmonic and disharmonic echo vowels Phonetic glyphs stood for simple consonant-vowel (CV) or vowel-only (V) syllables. However, Mayan phonotactics is slightly more complicated than this. Most Mayan words end with consonants, and there may be sequences of two consonants within a word as well, as in xolteʼ ( 'scepter') which is CVCCVC. When these final consonants were sonorants (l, m, n) or gutturals (j, h, ʼ) they were sometimes ignored ("underspelled"). More often, final consonants were written, which meant that an extra vowel was written as well. This was typically an "echo" vowel that repeated the vowel of the previous syllable. For example, the word [kah] 'fish fin' would be underspelled ka or written in full as ka-ha. However,