--------------------------- 0 : from 0 to 9999997 (9999998) --------------------------- 0 : from 0 to 4999998 (4999999) 1 : from 4999999 to 9999997 (4999999) --------------------------- 0 : from 0 to 3333332 (3333333) 1 : from 3333333 to 6666665 (3333333) 2 : from 6666666 to 9999997 (3333332) --------------------------- 0 : from 0 to 2499999 (2500000) 1 : from 2500000 to 4999999 (2500000) 2 : from 5000000 to 7499998 (2499999) 3 : from 7499999 to 9999997 (2499999)