What are the initials of the names of the three vectors?

${\color{#D61F06}\text{This problem's question:}}$ What are the initials of the names of the three vectors?

What is desired are the concatenated initials of the proper names of the curve's three vectors in ${\color{#3D99F6}\text{blue, dot-dashed}}$ , ${\color{#20A900}\text{green, dashed}}$ and ${\color{#D61F06}\text{red, solid}}$ order.

"In differential geometry, the Frenet–Serret formulas describe the kinematic properties of a particle moving along a continuous, differentiable curve in three-dimensional Euclidean space ℝ3, or the geometric properties of the curve itself irrespective of any motion."