search.py

parent = ['heute', 'sitze', 'ich', 'hier', 'und', 'morgen', 'sitze', 'ich', 'auch', 'dort']
child = ['sitze', 'ich', 'auch']

def search(parent, child):
    found = False
    for i in range(len(parent)):
        if parent[i] == child[0]:
            found = True
            for j, word in enumerate(child):
                if word != parent[i+j]:
                    found = False
                    break
            if found:
                return i
            
    return -1
            
search(parent, child)