X
3rt
x
3rt
x3
R
t
x3
r
t
x3r
T
x3r
t
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9