#а
s = "информатика"
s1 = s[2:7]
print(s1)
s2 = s[7:10]
print(s2)
#б
s = 'муха'
s = s.replace ("м","с")
s = s.replace ("у","л")
s = s.replace ("х","о")
s = s.replace ("а","н")
print(s)
#в
s = 'вебинариум'
s1 = s[8:]
print(s1)
s2 = s[0:2]+ s[6:4:-1]
print(s2)