ROI tracking
Ga-Galk Gall-Galz Gam-Gan Gao-Gar Gas-Gat Gau-Gaz  
Ge Gen Gep Gez    
Gia Gib-Gin Gio Gip-Giz Gl-Go    
Gra Gre-Gri Gro-Gru      
Gua Gub-Gue Guf-Guz