res=[1, 2, 3, 4, 5, 6, 7, 8, 9]
print(''.join(list(map(str,res))))
#############################
res=[1, 2, 3, 4, 5, 6, 7, 8, 9]
rel=''
for v in res:
    rel+=str(v)
print(rel)
#############################
from functools import reduce
res=[1, 2, 3, 4, 5, 6, 7, 8, 9]
print(reduce(lambda x,y:str(x)+str(y),res))