title: Find number of letters in a vector of strings c++
body: <p>I have a vector of strings
  example:
  dedf
  eedf
  fedf
  hedf</p>
  
  <p>I want to go through the list and count how many times each letter appears</p>
  
  <p>so for example the letter 
  d appears 5 times
  e appears 5 times
  f appears 5 times
  h appears 1 time</p>
  
  <p>I don't have no code so far but I'm trying to see how I can do this with logic first.</p>
  
  <p>I'm trying to code but don't know where to start.</p>
  
  <p>I was thinking I can store each letter into a string.
  string would be {dedfeedffedfhedf}</p>
  
  <p>Then take the string and count each time the letter is in that string
  but this is where I'm having a problem. Any thoughts? </p>
  
  <p>Any suggestions would also be appreciated. </p>
  
  <p>Thank You</p>