k_POWEROf2 = "²"
k_SIGN1 = "<"
k_SIGN2 = "="
Nat_Root= 25
Nat_Kount = 1 
Nat_N2 = 1
while Nat_N2 < Nat_Root:
    Nat_Kount += 1
    Nat_N2 = Nat_Kount * Nat_Kount

if Nat_N2 == Nat_Root:
    k_SIGN = k_SIGN1
else:
    k_SIGN = k_SIGN2

print( str(Nat_Kount) + k_POWEROf2 + k_SIGN + str(Nat_Root))