import sys
from collections import defaultdict

def main():
    # Read the 26 S_alpha values
    s_alpha = list(map(int, sys.stdin.readline().split()))
    # Read T
    T = sys.stdin.readline().strip()
    
    # Process T to get the run sequence R
    R = []
    prev = None
    for c in T:
        if c != prev:
            R.append(c)
            prev = c
    K = len(R)
    
    # For each character in R, collect the indices of their occurrences
    indices = defaultdict(list)
    for i, c in enumerate(R):
        indices[c].append(i)
    
    # Initialize the list to hold the length of each run in S
    l = [0] * K
    
    # Process each character's runs
    for c in indices:
        m_c = len(indices[c])
        # Get the available count for this character in S
        sa = s_alpha[ord(c) - ord('a')]
        if sa < m_c:
            print(0)
            return
        s_c = sa
        q = s_c // m_c
        r = s_c % m_c
        # Assign q+1 to the first r positions, q to the rest
        for idx in indices[c][:r]:
            l[idx] = q + 1
        for idx in indices[c][r:]:
            l[idx] = q
    
    # Compute the product of all run lengths
    mod = 2 ** 62
    product = 1
    for run_length in l:
        product *= run_length
        if product >= mod:
            print("hel")
            return
    print(product)

if __name__ == "__main__":
    main()