Which MBTI type is the saddest?

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Which MBTI type is the saddest?
Explore the world of Visual Identification
ENTP Faces ISFP Faces ESFJ Faces INTJ Faces
ESTP Faces INFP Faces ENFJ Faces ISTJ Faces
ESFP Faces INTP Faces ENTJ Faces ISFJ Faces
ENFP Faces ISTP Faces ESTJ Faces INFJ Faces