Find all the hidden elements

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1.
fire
2.
electric
3.
shadow
4.
frost
5.
energy
6.
water
7.
metal
8.
light
9.
spark
10.
element
11.
earth
12.
ice
13.
storm
14.
stone
15.
plasma
16.
air
17.
nature
18.
lava
19.
wind
20.
thunder