a=input('Введите строку: ')
max=-1
for i in range(len(a)):
    counter=0
    count1=0
    count2=0
    count3=0
    for j in range(i,len(a)):
        if a[j]=='(':
            count1+=1
        if a[j]=='[':
            count2+=1
        if a[j]=='{':
            count3+=1
        if a[j]==')':
            count1-=1
        if a[j]==']':
            count2-=1
        if a[j]=='}':
            count3-=1
        counter+=1
        if count1<0 or count2<0 or count3<0:
            break
        if count1==0 and count2==0 and count3==0 and counter>max:
            max=counter
            start=i+1
            end=j+1

print('Длина: ',max,'Начало: ',start,'Конец: ',end)