Q. initial voiceless nasalized stops became stops; [{mp|nt|ŋk}-] > [{ptk}-]

Phonetic Rule Elements

[mp-] > [p-] ✧ PE18/092.1205 (mp > p-); PE18/092.1103 (nt > t-)
[nt-] > [t-]
[ŋk-] > [k-] ✧ PE18/092.1203 (tk > c-)