@frontendinterviewlive5532

def main():
    n = int(input())
    arr = []
    for i in range(n):
        arr.append(input()[0])
    
    lower = [0] * 26
    upper = [0] * 26
    
    for char in arr:
        if 'A' <= char <= 'Z':
            upper[ord(char) - ord('A')] += 1
        elif 'a' <= char <= 'z':
            lower[ord(char) - ord('a')] += 1
    
    flag = False
    ch = '\0'
    for char in arr:
        if 'A' <= char <= 'Z':
            if upper[ord(char) - ord('A')] % 2 == 1:
                ch = char
                flag = True
                break
        elif 'a' <= char <= 'z':
            if lower[ord(char) - ord('a')] % 2 == 1:
                ch = char
                flag = True
                break
    
    if flag:
        print(ch)
    else:
        print("All are even")

if _name_ == "__main__":
    main()