one-one	two-one	three-one	four-one
one-two	two-two	three-three	four-four
one-three	two-three	three-three	four-three
one-four	two-four	three-four	four-four
one-five	two-five	three-five	four-five
one-six	two-six	three-six	four-six
one-seven	two-seven	three-seven	four-seven
one-eight	two-eight	three-eight	four-eight
one-nine	two-nine	three-nine	four-nine
one-ten	two-ten	three-ten	four-ten