function main(a: [group; (2, 1)]) {
  let b = [true; (6, 5, 4, 3, 2)];
  let c: [u32; (1, 2)] = [0u32; (1, 2)];
  let d = [0i8; (1)];
  // let d = [true; 0];
  // let e = [true; (0)];
}