Test solution

main.go

func Solution1(A int, B int) string {
	sL, sN, bL, bN := "b", B, "a", A

	if B > A {
		sL, sN, bL, bN = "a", A, "b", B
	}

	output := ""
	f := false
	r := 3

	for i := 1; i <= A+B; i++ {
		if !f && bN == sN && i%r != 0 {
			f = true
			r = 2
		}

		if i%r == 0 || bN == 0 {
			output += sL
			sN--
		} else {
			output += bL
			bN--
		}
	}

	return output
}

func Solution2(A int, B int) string {
	sL, sN, bL, bN := "b", B, "a", A

	if B > A {
		sL, sN, bL, bN = "a", A, "b", B
	}

	bR := bN - sN

	output := ""

	for i := 0; i < bN; i++ {
		if bR > 0 {
			output += bL
			bR--
		}

		if sN > 0 {
			output += bL + sL
			sN--
		}
	}

	return output
}