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// description:  key is a have dictionary is b
// b can also key of other dictonary 

//INPUT 

const arr =[{ A: 'B'},{B:'C'},{C:'D'},{D:'E'},{E:'F'}, {F:'A'}, {H:'K'}, {K:'H'}]


/*expect:
A -F 
B-F
C-F
D-F
E-F

*/
//SOLUTION

const keyValue = arr.reduce(function(result, item) {
  var key = Object.keys(item)[0]; 
  result[key] = item[key];
  return result;
}, {});

//array key to loop 
const mainKey = arr.flatMap(Object.keys)

const result ={}
let count =0;
for (let i=0; i< mainKey.length;i++) {
  count +=1
  let middleDictionary =[]
  let key = mainKey[i]
  let dictionary = keyValue[key]

  if(result[dictionary]) {result[key] = result[dictionary];continue;}

  if (!result[key]) result[key] =dictionary;
  while(keyValue[dictionary])
  {
    dictionary = keyValue[dictionary]
    if (dictionary == key)
    break;
    count+=1
    middleDictionary.push(dictionary)
  }
  
  if(middleDictionary.length) 
  {
    for(let j=0; j< middleDictionary.length; j++) {
      
      //for case final dictionary - final dictionary
     
      result[middleDictionary[j]] = dictionary
    }
  }
  result[key] =dictionary
}

const arrRes = Object.keys(result).map(i=> ({key :i, dictionary : result[i]}))

console.log('input key-dictionary is ', arr)
console.log('array key is',mainKey)
console.log('object have only key-value is', keyValue)
console.log('result is',result)
console.log('count is ', count)
console.log('final arr result', arrRes)