py

text = input().split(' ')

s = text[0]
n = int(text[1])
L = len(s)

while n > L:
L *= 2

def f(L,n):
# 边界
if L <= len(s):
print(s[n-1])
return

if n > L//2+1:
    f(L//2,n-L//2-1)
elif n == L//2+1:
    f(L//2,L//2)
else:
    f(L//2,n)

f(L,n)