'''input'''
i1=lambda:int(s1())
i2=lambda:map(int,s2())
il=lambda:list(i2())
s1=lambda:input()
s2=lambda:s1().split()
sl=lambda:list(s2())
'''output'''
yn=lambda b:print("Yes" if b else "No")
'''createList'''
cl=lambda x,d:[d for i in range(x)]# a=c2l(10,23,"x")
'''code'''
moji='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
li=[0 for i in range(26)]
N=i1()
S=s1()
for i in S:
    li[moji.find(i)]+=1
for i in li:
    print(str(i),end="")