Puzzle

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Across
  1. 3. M([aio])([chn])\2\1(\1\2){2}
  2. 4. H([aio])d\1lg\1
  3. 5. C(oah|hi|am)([aeiou]){2}la
  4. 6. [Mxc][eio](\1\2){2}
  5. 11. (Ag|Fe|Ja)[a-jr-w]{3}c(gua|los|ali)([eio])nt\3s
  6. 13. (Gue|Oax|Baj)[ar]\s[ABC]al[f-k]{2}(ern|orn|arn)[^j-z]{2}
  7. 14. C[D-X]{3}
  8. 15. [CJP]([^a-gk-z])i\1(ue|io|ua)\1\2
Down
  1. 1. C([i-o])m*a
  2. 2. G([ou])[aei](a-n){3}\1u(ato|ro)
  3. 5. C(ej|al|hi)([a-c])p\2[szr]
  4. 7. B[aei](ja|ll|ra)\sC([a-d])[leirf]{3}or[g-jm-p]{2}\2\sS(or|ax|ur)
  5. 8. [CDE]([a-u]){3}\1{2}o
  6. 9. J([aio])l\1sc\1
  7. 10. G([eou])\1r(r\1){2}
  8. 12. [ABC](il|am|de)p[aec]{2}(he|lo|ne)