foo(0u, _) ==> <<FALSE>>
foo(1u, "one")
foo(2u, _) ==> <<FALSE>>
foo(3u, "three")
foo(4u, _) ==> <<FALSE>>
foo(5u, "five")
foo(6u, _) ==> <<FALSE>>
foo(7u, "seven")
foo(8u, _) ==> <<FALSE>>