dic={}
result=0
string=input()
for c in string:
if c in dic:
dic[c] += 1
else:
dic[c] = 1
for c in dic:
result+=dic[c]*dic[c]
print(result)963A - Alternating Sum | 1191B - Tokitsukaze and Mahjong |
1612G - Max Sum Array | 1459B - Move and Turn |
1006F - Xor-Paths | 706C - Hard problem |
304C - Lucky Permutation Triple | 1301C - Ayoub's function |
38E - Let's Go Rolling | 171G - Mysterious numbers - 2 |
1183C - Computer Game | 400C - Inna and Huge Candy Matrix |
417A - Elimination | 222A - Shooshuns and Sequence |
1736A - Make A Equal to B | 1736B - Playing with GCD |
887C - Solution for Cube | 1737C - Ela and Crickets |
1741C - Minimize the Thickness | 1741A - Compare T-Shirt Sizes |
1741D - Masha and a Beautiful Tree | 109B - Lucky Probability |
1741B - Funny Permutation | 1741E - Sending a Sequence Over the Network |
344B - Simple Molecules | 370A - Rook Bishop and King |
546E - Soldier and Traveling | 1741G - Kirill and Company |
1200B - Block Adventure | 1088B - Ehab and subtraction |