def getBert(string):
    newstr=(string.lower()).split("bert")
    if len(newstr) > 2:
        return "".join(newstr[1:-1])[::-1]
    else: 
        return ""

85f7dccfc4a8a830575244867e3c8f34433cf5ae
<mask token>

def getBert(string):
    newstr = string.lower().split('bert')
    if len(newstr) > 2:
        return ''.join(newstr[1:-1])[::-1]
    else:
        return ''

def getBert(string):
    newstr=(string.lower()).split("bert")
    if len(newstr) > 2:
        return "".join(newstr[1:-1])[::-1]
    else: 
        return ""
