D
R
A
R
T
A
R
A
F
F
A
A
T
T
D
T
T
D
A
F
D
F
A
T
T
R
D
R
A
T
R
D
F
D
F
D
F
F
R
R
F
T
R
R
D
D
T
D
F
T
F
A
R
A