Eight persons F, G, H I, J, K, L and M attend seminar on four different months January, April, November and December of the same year. Seminar was conducted on either 15th of 25th of the month. G attends the seminar 15th of the month which has only 30 days. M and J attend the seminar on the same morith before G, but not in the month April. M attends the seminar after J. No one attends the seminar after F. Only one person attends the seminar between M and K. Both H and L attend the seminar on the 15th of different month. L and I attend the seminar on the same month How many persons attend seminar between G and H?