A, B = raw_input().split()
flag = 0
for i in range(1, len(A)):
	if A[i] != '0': flag = 1
for i in range(1, len(B)):
	if B[i] != '0': flag = 1
if flag == 0:
	print int(A)*int(B)/10
else:
	rslt = int(A)*int(B)
	if len(str(rslt)) > 8: print 'E'
	else: print rslt