M = {{11,12,13,14,15,16,17},
     {21,22,23,24,25,26,27},
     {31,32,33,34,35,36,37},
     {41,42,43,44,45,46,47},
     {51,52,53,54,55,56,57}}
     
print("")
print("Matrix.Sub(M,3)")
print(Matrix.Sub(M,3))

print("")
print("Matrix.Sub(M,2,4)")
print(Matrix.Sub(M,2,4))

print("")
print("Matrix.Sub(M,1,2,3,4)")
print(Matrix.Sub(M,1,2,3,4))