Program to find the deconvolution of two sequences.

Please help me with the code to find the deconvolution of two finite sequences h(n) and y(n).

I have written the following code:

clc
close all

y=input('Enter y');
h=input('Enter h');

lh=length(h);
ly=length(y);

lx=ly-lh+1;

a=zeros(ly,ly);

a

a(1:lh,1)=h;

for i=1:ly-1
    for j=1:lx-1
        a(i+1,j+1)=a(i,j);
    end
end

a

a1=inv(a);

a1

x=a1*y';

x

The result of the inv() operation is a matrix with all elements Inf.

Please advice.