A, B = map(int, input().split())

a = set(str(abs(A))[1:])
b = set(str(abs(B))[1:])

if len(a) == 1 and len(b) == 1 and abs(A) > 99 and abs(B) > 99:
    X = A * B // 10 
else:
    if abs(A * B) < 10**8:
        X = A * B
    else:
        X = 'E'

print(X)