from qiskit import ClassicalRegister,QuantumRegister,QuantumCircuit,Aer

from qiskit import IBMQ

IBMQ.load_account()

S_simulator=Aer.backends(name='statevector_simulator')[0]

M_simulator=Aer.backends(name='qasm_simulator')[0]

q1=QuantumRegister(2,name='q1')

c1=ClassicalRegister(2,name='c1')

qc1=QuantumCircuit(q1,c1,name='qc1')

q2=QuantumRegister(2,name='q2')

c2=ClassicalRegister(2,name='c2')

qc2=QuantumCircuit(q2,c2,name='qc2')

qc1.h(q1[0])

qc1.iden(q1[1])

qc2.h(q2[0])

qc2.iden(q2[1])

qc3=qc1+qc2

print(qc3.qasm()[36:len(qc3.qasm())])

qc2+=qc1

print(qc2.qasm()[36:len(qc2.qasm())])