email = input()
while True:
    command = input()
    if command == "Valid":
        break
    data = command.split()
    action = data[0]
    if action == "Upper":
        index = int(data[1])
        email = email[:index] + email[index].upper() + email[index + 1:]
        print(email)
    elif action == "Lower":
        index = int(data[1])
        email = email[:index] + email[index].lower() + email[index + 1:]
        print(email)
    elif action == "Insert":
        index = int(data[1])
        char = data[2]
        email = email[:index] + char + email[index:]
        print(email)
    elif action == "Change":
        char = data[1]
        value = int(data[2])
        if char in email:
            new = ord(char) + value
            email = email.replace(char, chr(new))
        print(email)
    elif action == "Validation":
        upper_count = 0
        lower_count = 0
        digit_count = 0
        others = 0
        for a in email:
            if not a.isdigit() and not a.isalpha() and not a == "@":
                others += 1
            elif a.isupper():
                upper_count += 1
            elif a.islower():
                lower_count += 1
            elif a.isdigit():
                digit_count += 1
        if len(email) < 6:
            print(f"Email must be at least 6 characters long!")
        if others > 0:
            print("Email must consist only of letters, digits and @!")
        if upper_count == 0:
            print("Email must consist at least one uppercase letter!")
        if lower_count == 0:
            print("Email must consist at least one lowercase letter!")
        if digit_count == 0:
            print("Email must consist at least one digit!")