dial_dic = {'A':2,'B':2,"C":2,"D":3,"E":3,"F":3,"G":4,"H":4,"I":4,"J":5,"K":5,"L":5,"M":6,"N":6,"O":6,"P":7,"Q":7,"R":7,"S":7,"T":8,"U":8,"V":8,"W":9,"X":9,"Y":9,"Z":9}

string = str(input())
string = list(string)

result = 0

for c in string:
    result += dial_dic[c]+1

print(result)