938
2
20
883
0
20
429
2
19
1262
0
19
802
0
18
554
2
17
739
5
17
513
0
17
998
4
17
875
0
17
1257
0
17
479
0
16
415
0
16
1274
0
16
696
5
15
279
0
15
1127
0
15
Didn't find what you're looking for? Try searching on Q&A, too!
Keyword(s): Lesson2 Our Energy Sources