Double D, CN Wiki

Edd (often called Double D) is one of the three main protagonists of the show Ed, Edd, n' Eddy.

China - Wikipedia

India's Imports From Russia Doubled To $20.45 Billion In April

What's With Double D? (Ed, Edd n Eddy) by AustinSPTD1996 on DeviantArt

History of China - Wikipedia

The penta is one of my favorite weapons and I was reading through

What's With Double D? (Ed, Edd n Eddy) by AustinSPTD1996 on DeviantArt

Double D, Anime Fanon Wiki

Double Dragon - Wikipedia

Song dynasty - Wikipedia

随机算法 (Spring 2013)/Mixing Time and Coupling - TCS Wiki