$V_{CKM}$

$U_1^{d†}$

$U_2^{d†}$

$U_3^{d†}$

$U_4^{d†}$

$U_1^u$

$1_{3\times 3}$

E

$E^{*}$

G

$U_2^u$

$E^{*}$

$1_{3\times 3}$

H

F

$U_3^u$

E

H

$1_{3\times 3}$

$F^{*}$

$U_4^u$

G

F

$F^{*}$

$1_{3\times 3}$