40 lines
646 B
C++
40 lines
646 B
C++
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#include <bits/stdc++.h>
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using namespace std;
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using ll = long long;
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void solve()
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{
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string s;
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cin >> s;
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bool cap = 1;
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for (int i = 1; i < s.size(); ++i)
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{
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if (islower(s[i]))
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{
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cap = 0;
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break;
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}
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}
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if (cap)
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{
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for (int i = 0; i < s.size(); ++i)
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{
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if(islower(s[i]))
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s[i]=toupper(s[i]);
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else s[i]=tolower(s[i]);
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}
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}
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cout<<s<<endl;
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}
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int main()
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{
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ios_base::sync_with_stdio(false);
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cin.tie(nullptr);
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int TC = 1;
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// cin >> TC;
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// cin.ignore();
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while (TC--)
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solve();
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}
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