Revision history of "an empty string is not a natural number" (Z13498)

Mata ĩdé repurawaka: e-muçãgau purawakaçawa rĩbia'etá werçawa'etá ĩdé repurari repurawaki açui e-sisika enter ã e-sisika rĩbiá iwira purãdupawa.
Titapawa: (kuiriwara) = amũrupiçawa'etá irũ pirí werçawa'etá upawa, (tenũdéwara) = amũrupiçawa'etá irũ pirí werçawa tenũdéwara, m = sinimuka'í.