Lesson 06 - Keys : f0y

Test 01 = ff0f0 00yy0 f0fy0 000ff yf00f 
Test 02 = ff000 fyf00 yyf0f f0yy0 0yf00 
Test 03 = 0fyff 0yf0y f000f f0f0y 0ffy0 
Test 04 = 0fy0y f0yyy fyfyy ffyyy f00y0 
Test 05 = y00ff yf0y0 00y00 yyff0 yff0y 
Test 06 = yyyy0 ffffy 00f0y 0fff0 f00yf 
Test 07 = fyy0f 0ffy0 0fy0f y0yff fy0fy 
Test 08 = y0fyf fffyf y0yf0 yy000 yyffy 
Test 09 = 0y0f0 f0fff 0f0f0 fffy0 0ffff 
Test 10 = 0fffy 00fff f0yf0 fy00y yff00