silbo, which comes from the spanish silbar , features four vowels and four consonant that can be used to from more than 0.000 words. "I use it for everything :to talk to my wife, to tell my kids something , to find a friend if we g
silbo, which comes from the spanish silbar, features four vowels and four consonant that can be used to from more than 0.000 words. "I use it for everything: to talk to my wife, to tell my kids something, to find a friend if we g