Friendlist Maintenance

name_list = input()
name_list = name_list.split(', ')

while True:
    command = input()
    command = command.split(' ')

    if 'Report' in command:
        break
    elif 'Blacklist' in command:
        if len(command) >= 2:
            name = command[1]
            if name in name_list:
                i = name_list.index(name)
                name_list[i] = 'Blacklisted'
                print(f'{name} was blacklisted.')
            else:
                print(f"{name} was not found.")
    elif 'Error' in command:
        if len(command) >= 2:
            i = command[1]
            if len(i) == 1 and (48 <= ord(i) <= 57):
                i = int(i)
                if i < len(name_list):
                    name = name_list[i]
                    if name != 'Blacklisted' and name != 'Lost':
                        name_list[i] = 'Lost'
                        print(f"{name} was lost due to an error.")
    elif 'Change' in command:
        if len(command) >= 3:
            i = command[1]
            if len(i) == 1 and (48 <= ord(i) <= 57):
                i = int(i)
                if i < len(name_list):
                    current_name = name_list[i]
                    new_name = command[2]
                    print(f"{current_name} changed his username to {new_name}.")
                    name_list[i] = new_name

blacklistedNamesCount = name_list.count('Blacklisted')
lostNamesCount = name_list.count('Lost')

print(f"Blacklisted names: {blacklistedNamesCount}")
print(f"Lost names: {lostNamesCount}")
print(' '.join(name_list))