function getPairsWithSum(letter) {
    let result = [];
    const number = letter.charCodeAt(0) - 65;
    const indexBoundary = Math.floor(number / 2);
    for (let i = 0; i <= indexBoundary; i++) {
        result.push(`${String.fromCharCode(i + 65)} + ${String.fromCharCode(number - i + 65)}`);
    }
    return result;
}