DIGIT = 100
ans = 0
is_zero = False

for i in range(DIGIT - 1, -1, -1):
    m = 10**i
    
    if is_zero:
        ans = 10 * ans
        continue
    
    for j in range(10):
        n = j + 1
        print("?", n, m)
        
        match input():
            case "<":
                continue
            case "=":
                ans = 10 * ans + n
                is_zero = True
                break
            case ">":
                ans = 10 * ans + j
                break
    else:
        is_zero = True
        ans = 10 * ans
        continue

print("!", ans)