从输入字符串元素中删除空格并在列表中搜索

I have initial_list=['a', 'b с', 'c'], which is written below. After that, I need to input two values and search for their indexes. For example, I need to input a,b c and got [0, 1] list. But there are some difficulties.

这是我的代码：

initial_list=['a', 'b с', 'c']
new_list=[]
new_list2=[]
for elem in initial_list:
    new_list.append(elem)
    if (' ') in elem:
        new_list.remove(elem)
        newelem=(f'{elem[0]}{elem[2]}')
        new_list.append(newelem)
print(new_list) #PRINT #1


desired_index_variable=[str(i) for i in input('Input desired indexes with comma between(NO SPACE AFTER COMMA) ').split(',')]
for elem in desired_index_variable:
    new_list2.append(elem)
    if (' ') in elem:
        new_list2.remove(elem)
        newelem=(f'{elem[0]}{elem[2]}')
        new_list2.append(newelem)
print (new_list2) #PRINT #2


try:
    desired_index=[]
    for element in new_list2:
        desired_index.append(initial_list.index(new_list))
    print (desired_index) #PRINT #3
except ValueError:
    print ('No such element in initial list')

该程序的工作原理是：

>>['a', 'bс', 'c']
>>Input desired indexes with comma between(NO SPACE AFTER COMMA) a,b c
>>['a', 'bc']
>>No such element in initial list

So I did a joining of b c: the result of PRINT#1 is :['a', 'bс', 'c']

After that I did joining of input values a,b c : >>['a', 'bc']

But the result is not the [0, 1] , but No such element in initial list

我在哪里错过寻找正确索引的最后一步？