1052054_0_0_1670.cpp: In function `int main()':
1052054_0_0_1670.cpp:14: error: no match for 'operator>=' in 's >= 'A''
1052054_0_0_1670.cpp:14: error: no match for 'operator<=' in 's <= 'Z''
1052054_0_0_1670.cpp:15: error: no match for 'operator-' in 's - 'A''
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