There is a four-digit number. It is known that adding 1 to its tens digit is equal to its ones digit; adding 1 to its ones digit is equal to its hundreds digit. The sum of the number formed by arranging the four-digit number upside down and the original number is equal to 10769, find the four-digit number.
有一个四位数，已知其十位数字加1，等于其个位数字；个位数字加1等于其百位数字．把这个四位数颠倒次序排列所成的数与原数之和等于10769，求这个四位数．
<result>1_978</result>