8. The URL of the Hua Cup Competition is www.huabeisai.cn, and the letters form the following equation:
www+hua+bei+sai+cn=2008.

If each letter represents a digit from $0 \sim 9$, the same letter represents the same digit, different letters represent different digits, and $\mathrm{w}=8, \mathrm{~h}=6, \mathrm{a}=9, \mathrm{c}=7$, then the minimum value of the three-digit number $\overline{b e} i$ is _. $\qquad$
$103$