阅读下列语段，并将它们重新排列顺序，组成一篇连贯的短文。
A. The shorter boy replied, "When someone hurts you, you should write it in the sand from which the
wind can erase it easily. However, when someone does something good for you, you should carve
(雕刻) it on a stone from which the wind can never erase it."
B. The taller boy asked him, "After I hurt you, you wrote in the sand, but now you carve on the stone.
Why?"
C. Two friends were walking through the desert (沙漠). During the journey they had an argument, and
the taller boy hit the shorter one in the face. The shorter boy was hurt.
D. They kept on walking until they found a pond (池塘). And they decided to take a bath there. The
shorter boy got stuck in the mud and started to sink, but luckily he was saved by the taller boy. After
that, he carved on a stone, "Today my best friend saved my life."
E. But without saying anything, he wrote in the sand, "Today my best friend hit me in the face."
The right order: 1. _____ 2. _____ 3. _____ 4. _____ 5. _____
N的化学方程式： 。