In data analysis, the eliminate algorithm determines the single final value to use for each data parameter. The eliminate algorithm works in the following way:

• Data is acquired from multiple sources in order from least to most preferred, i.e if a parameter P is present in both source 1 and source 2, the parameter from the higher priority source, source 2, is used in the final parameter list, and any value from an earlier source is superseded.
• As new parameters arrive, they are added to the list.
• If a parameter P is present only in one of the sources, it is directly added to the final parameter list.

Hence,

• The result of performing the above operations until all parameters from source 1 and source 2 are exhausted is the result of Eliminate-algorithm(source 1, source 2).
• Each time a new value for a parameter is encountered from a higher preferred site, the old data is superseded.
• Assuming three sources S₁, S₂, S₃:
  • Eliminate-algorithm(S₁, S₂, S₃) = Eliminate-algorithm (Eliminate-algorithm(S₁, S₂), S₃).

Given a list of sources S₁, S₂...Sₙ, find the final parameter list given by Eliminate-algorithm(S₁, S₂...Sₙ). Maintain your results in the order a key was first encountered.

For example, a rating parameter of buy, sell or hold from three sources in increasing order of preference: [buy, sell, hold], where buy is from S₁, immediately superseded by sell S₂, immediately superseded by hold S₃. The final rating is the only one that hasn't been superseded, so you use 'hold' as the final rating.

Function Description

Complete the function computeParameterValue in the editor.

computeParameterValue has the following parameter(s):

1. String[][] sources: A 2-dimensional array of key: value pairs, each row is one source's data, sources presented from lowest to highest preference.