DIGIT = 100
ans = 0
is_zero = False

for i in range(DIGIT - 1, -1, -1):
    if is_zero:
        ans = 10 * ans
        continue
    
    for j in range(9, -1, -1):
        m = (j + 1) * 10**i
        print("?", 1, m)
        
        match input():
            case "<":
                continue
            case "=":
                is_zero = True
                ans = 10 * ans + j + 1
                break
            case ">":
                ans = 10 * ans + j + 1
                break
    else:
        ans = 10 * ans

print("!", ans)