Let the lowercase Latin indices a,b,c range from 1 to p (i.e., the tangential indices) and the Greek indices μ, γ range from p+1 to n (i.e., the normal indices).
Assign the indices a, b, c with values from 1 to p as the tangent indices, while assigning the indices μ, γ with values from p+1 to n as the normal indices.