o-u u u-y-t r t- o---- u-t t t-t-t y r- i---- i i i i i i i-i o i- u u u u-u u-u i u- o-y y y-y-y e r- o - o - o - i - i i i i i i i-i o i- u u u u-u u-u i u- o-y y y-y-y e r- o - i - o--- o-o o - o-o o - i-i i-i i-i i - i-t t-t t-t y-y u---- o-o o - o-o o - i-i i-i i-i i - i-e e-e e-e r-r o---- o-u-u-u-u-u- u-y-t-w--- o-y-y-y-y-y- y-u-r-o--- o-u-u-u-u-u- u-y-t-w--- o-y-y-y-y-y- y-u-r-o