A piece of target paper has three circles in total. If you hit the inner circle, you get 10 rings, if you hit the middle circle, you get 8 rings, and if you hit the outer circle, you get 6 rings. Xiao Ming voted twice, how many different results could there be?
一张靶纸共三圈，投中内圈得10环，投中中圈得8环，投中外圈得6环．小明投了2次，可能有多少种不同的结果？
<result>5</result>