text: siwol ("October") The cardinals for three and four have alternative forms in front of some measure words:
  seok dal ("three months")
  neok jan ("four cups")
  Korean has several words formed with two or three consecutive numbers. Some of them have irregular or alternative forms.
  한둘 handul ("one or two") / 한두 handu ("one or two" in front of measure words)
  두셋 duset ("two or three") / 두세 duse ("two or three" in front of measure words)
  서넛 seoneot ("three or four") / 서너 seoneo ("three or four" in front of measure words)
  두서넛 duseoneot ("two or three or four") / 두서너 duseoneo ("two or three or four" in front of measure words)
  너덧 neodeot, 네댓 nedaet, 네다섯 nedaseot, 너더댓 neodeodaet ("four or five")
  대여섯 daeyeoseot, 대엿 daeyeot ("five or six")
  예닐곱 yenilgop ("six or seven")
  일고여덟 ilgoyeodeol, 일여덟 ilyeodeol ("seven or eight")
  여덟아홉 yeodeolahop, 엳아홉 yeotahop ("eight or nine")
  As for counting days in native Korean, another set of unique words are used:
  하루 haru ("one day")
  이틀 iteul ("two days")
  사흘 saheul ("three days")
  사나흘 sanaheul, 사날 sanal ("three or four days")
  나흘 naheul ("four days")
  네댓새 nedaessae, 너댓새 neodaessae, 너더댓새 neodeodaessae, 나달 nadal ("four or five days")
  닷새 dassae ("five days")
  대엿새 daeyeossae ("five or six days")