u-u y t-e- i u i y--- y-y t u y t t u---- u-u y t-e- i-i y--- y-y t u y t t u---- i-i u y-t- u-u y--- I y y t y-u t u e---- i-t t t t e y u u---- i-y t u y t t u---- u-e-e-e e e e e e - e e e e e e-e-e e-e-e-e e e e e e-e e- e-e-e-- i t y t u y t t u