Язык Python
str = input()
yes = False
for i in str:
if(i == "б"):
print("да")
yes = True
break
if(yes==False):
print("нет")
Язык Python
str = input()
yes = False
for i in str:
if(i == "б"):
print("да")
yes = True
break
if(yes==False):
print("нет")