s = input()n = len(s)print(s[0:4])print(s[n//2-1:n//2+2])print(s[::5])print(s[4::5]) print("========") s = input()n = len(s)print(s[0:4])print(s[n//2-1:n//2+2])print(s[::5])print(s[4::5])
123456789012345 1234567890123456
1234 789 161 505 ======== 1234 890 1616 505
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