18 lines
273 B
C
18 lines
273 B
C
#include <stdio.h>
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int main()
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{
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char c;
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while ((c = getchar()) != EOF) {
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if(c<='z'&&c>='a'){
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c=c+('A'-'a');
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}else if(c<='Z'&&c>='A'){
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c=c-('A'-'a');
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}
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printf("%c",c);
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}
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printf("\n");
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return 0;
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}
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