tokens: This definition is supported by the fact that the Tepanec Glyph appears on several documents ( Boturini Codex or “ Tira de la peregrinación ” , Azcatitlan and Xolotl Codexes ) , which , associated with the `` calli '' glyph , portray the idea of a “ nation ” or human group , appear one of the most normalized Nahuatl glyphs , the one meaning `` piedra '' ( stone ) .