Multiple choice
The Laflamme 5-qubit perfect code is defined by the four cyclic generators XZZXI, IXZZX, XIXZZ, ZXIXZ, with logical operators Xbar = XXXXX and Zbar = ZZZZZ. The distance is the minimum Pauli weight of an operator in the normalizer N(S) but not in the stabilizer group S. What is the code distance?