There is a four-digit number, the sum of the ones digit and the hundreds digit is 12, the sum of the tens digit and the thousands digit is 9, if the ones digit is interchanged with the hundreds digit, and the thousands digit is interchanged with the tens digit , the new number is 2376 more than the original number, find the original number.
有一个四位数，个位数字与百位数字的和是12，十位数字与千位数字的和是9，如果个位数字与百位数字互换，千位数字与十位数字互换，新数就比原数增加2376，求原数．
<result>3_963</result>