I have a tensor X = (B, 2) and another tensor Y= (b, 2), where Y is a subset of X (B>=b), how can I return the indices of the values of Y in X.

for example,

X=(

[1, 2],

[4,5],

[3,1],

[7,8])

Y=(

[1, 2]

[7, 8])

I want return [0, 2].

I have a tensor X = (B, 2) and another tensor Y= (b, 2), where Y is a subset of X (B>=b), how can I return the indices of the values of Y in X.

for example,

X=(

[1, 2],

[4,5],

[3,1],

[7,8])

Y=(

[1, 2]

[7, 8])

I want return [0, 2].