91. On a long strip of paper, consecutive natural numbers $1, 2, 3, \cdots \cdots n$ are written in sequence. The long strip is cut into five segments, each containing some numbers (the digits of a single number will not be cut into different segments). The average of the numbers in these five segments are $1234, 345, 128, 19$, and $9.5$ (the order of these five numbers is scrambled). Therefore, $n=$
answer: 2014