a, b, c are three mathematics, and a>b>c. The two numbers a and b can form two different two-digit numbers, and the sum of these two two-digit numbers is 55. Six different three-digit numbers can be formed from the three numbers a, b, and c, and the sum of these six three-digit numbers is greater than 1300 and less than 1400. So, what is the three-digit number abc=?
a，b，c是三个数学了，且a＞b＞c．由a，b两个数字可组成两个不同的两位数，这两个两位数之和是55．由a，b，c三个数字可组成六个不同的三位数，这六个三位数之和大于1300且小于1400．那么，三位数abc=多少．
<result>321</result>