duolingo
1
1
WTF
7 m
2
1000 
1000
400
100
+167
1
1000
1000
400
100
+100
1000
1000
400
100
+64
1
1000
1000
400
100
+67
3
1000
1000
400
100
+16
1000
1000
400
100
+9
1000
1000
400
100
+39
1000
1000
400
100
+77