Five tones: Gong, Shang, Jiao, Zheng, Yu.

Gongchi spectrum: He, Si, Yi, Shang, Chi, Gong, Fan, Liu, Wu, Yi.

Modern roll call: Duo, Xiao, Mi, Fa, Shuo, La and Xi.

Reduced character spectrum: earth, shame, zhi, 郳, angle, mountain, geng, fire, er, water, ye, ear.

Another example is the G chord, the word "teeth" for teeth is enough.