Buggy python submission (verdict: Time Limit Exceeded):
n, m = map(int, input().split())
index = 0
listForL = []
listForL2 = []
while index < m:
    p, y = map(int, input().split())
    listForL.append([p, y])
    listForL2.append([p, y])
    index+=1

listForL2.sort()
listForId=[]
index2 =0
count = 0
before=0
while index2 < len(listForL2):
    if before!=listForL2[index2][0]:
        count=1
        before = listForL2[index2][0]
    else:
        count+=1
    mojiR=str(listForL2[index2][0])
    mojiL=str(count)
    index3=0
    if len(mojiR)==1:
        mojiR="00000"+mojiR
    elif len(mojiR)==2:
        mojiR = "0000"+mojiR
    elif len(mojiR)==3:
        mojiR = "000"+mojiR
    elif len(mojiR)==4:
        mojiR = "00"+mojiR
    elif len(mojiR)==5:
        mojiR = "0"+mojiR
    if len(mojiL) == 1:
        mojiL = "00000"+mojiL
    elif len(mojiL) == 2:
        mojiL = "0000"+mojiL
    elif len(mojiL) == 3:
        mojiL = "000"+mojiL
    elif len(mojiL) == 4:
        mojiL = "00"+mojiL
    elif len(mojiR) == 5:
        mojiL = "0"+mojiL
    index2+=1
    listForId.append(mojiR+mojiL)

index5=0
while index5 < len(listForL):
    targetI = listForL2.index(listForL[index5])
    print(listForId[targetI])
    index5+=1

Fixed submission:
n, m = map(int, input().split())
index = 0
listForL = []
listForL2 = []
while index < m:
    p, y = map(int, input().split())
    listForL.append([p, y])
    listForL2.append([p, y, index])
    index+=1

listForL2.sort()
listForAns=[0]*m
index2 =0
count = 0
before=0
while index2 < len(listForL2):
    if before!=listForL2[index2][0]:
        count=1
        before = listForL2[index2][0]
    else:
        count+=1
    mojiR=str(listForL2[index2][0])
    mojiL=str(count)
    index3=0
    if len(mojiR)==1:
        mojiR="00000"+mojiR
    elif len(mojiR)==2:
        mojiR = "0000"+mojiR
    elif len(mojiR)==3:
        mojiR = "000"+mojiR
    elif len(mojiR)==4:
        mojiR = "00"+mojiR
    elif len(mojiR)==5:
        mojiR = "0"+mojiR
    if len(mojiL) == 1:
        mojiL = "00000"+mojiL
    elif len(mojiL) == 2:
        mojiL = "0000"+mojiL
    elif len(mojiL) == 3:
        mojiL = "000"+mojiL
    elif len(mojiL) == 4:
        mojiL = "00"+mojiL
    elif len(mojiL) == 5:
        mojiL = "0"+mojiL
    listForAns[listForL2[index2][2]]=mojiR+mojiL
    index2+=1

for ans in listForAns:
    print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
n, m = map(int, input().split())
index = 0
listForL = []
listForL2 = []
while index < m:
    p, y = map(int, input().split())
    listForL.append([p, y])
    listForL2.append([p, y])
    index+=1

listForL2.sort()
listForId=[]
index2 =0
count = 0
before=0
while index2 < len(listForL2):
    if before!=listForL2[index2][0]:
        count=1
        before = listForL2[index2][0]
    else:
        count+=1
    mojiR=str(listForL2[index2][0])
    mojiL=str(count)
    index3=0
    while index3 < 6:
        if len(mojiR)< 6:
            mojiR="0"+mojiR
        elif len(mojiR)==6:
            break
        index3+=1
    index4=0
    while index4 < 6:
        if len(mojiL)< 6:
            mojiL="0"+mojiL
        elif len(mojiL)==6:
            break
        index4+=1
    index2+=1
    listForId.append(mojiR+mojiL)

index5=0
while index5 < len(listForL):
    targetI = listForL2.index(listForL[index5])
    print(listForId[targetI])
    index5+=1
    

Fixed submission:
n, m = map(int, input().split())
index = 0
listForL = []
listForL2 = []
while index < m:
    p, y = map(int, input().split())
    listForL.append([p, y])
    listForL2.append([p, y, index])
    index+=1

listForL2.sort()
listForAns=[0]*m
index2 =0
count = 0
before=0
while index2 < len(listForL2):
    if before!=listForL2[index2][0]:
        count=1
        before = listForL2[index2][0]
    else:
        count+=1
    mojiR=str(listForL2[index2][0])
    mojiL=str(count)
    index3=0
    if len(mojiR)==1:
        mojiR="00000"+mojiR
    elif len(mojiR)==2:
        mojiR = "0000"+mojiR
    elif len(mojiR)==3:
        mojiR = "000"+mojiR
    elif len(mojiR)==4:
        mojiR = "00"+mojiR
    elif len(mojiR)==5:
        mojiR = "0"+mojiR
    if len(mojiL) == 1:
        mojiL = "00000"+mojiL
    elif len(mojiL) == 2:
        mojiL = "0000"+mojiL
    elif len(mojiL) == 3:
        mojiL = "000"+mojiL
    elif len(mojiL) == 4:
        mojiL = "00"+mojiL
    elif len(mojiL) == 5:
        mojiL = "0"+mojiL
    listForAns[listForL2[index2][2]]=mojiR+mojiL
    index2+=1

for ans in listForAns:
    print(ans)