def main():
    import sys
    input = sys.stdin.read().split()
    ptr = 0
    N = int(input[ptr])
    ptr += 1
    a, b, c = map(int, input[ptr:ptr+3])
    ptr += 3
    S = input[ptr:ptr+N]
    
    # Compute prefix sums
    sum_ = [0] * (N + 1)
    pre_sum_dict = {0: 0}
    current_sum = 0
    for i in range(1, N + 1):
        current_sum += len(S[i-1])
        sum_[i] = current_sum
        pre_sum_dict[current_sum] = i  # Since sum is strictly increasing, overwriting is not needed
    
    ans = 0
    for R in range(1, N + 1):
        sum_R = sum_[R]
        sum_x_target = sum_R - b - c
        if sum_x_target not in pre_sum_dict:
            continue
        x = pre_sum_dict[sum_x_target]
        sum_y_target = sum_x_target + b  # which should equal sum_R - c
        if sum_y_target not in pre_sum_dict:
            continue
        y = pre_sum_dict[sum_y_target]
        # Check if x < y and y < R
        if not (x < y and y < R):
            continue
        sum_L1 = sum_x_target - a
        if sum_L1 not in pre_sum_dict:
            continue
        ans += 1
    print(ans)

if __name__ == "__main__":
    main()