# Write a Python dictionary, set and counter to check if frequencies can become same 
 # Function to Check if frequency of all characters
# can become same by one removal
from collections import Counter
  
def allSame(input):
      
    # calculate frequency of each character
    # and convert string into dictionary
    dict=Counter(input)
  
    # now get list of all values and push it
    # in set
    same = list(set(dict.values()))
  
    if len(same)>2:
        print('No')
    elif len (same)==2 and same[1]-same[0]>1:
        print('No')
    else:
        print('Yes')
  
      
    # now check if frequency of all characters 
    # can become same
      
# Driver program
if __name__ == "__main__":
    input = 'xxxyyzzt'
    allSame(input)